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Effect of high-temperature acid aging on microstructure and mechanical properties of PEEK Polym. Test. (IF 5.1) Pub Date : 2024-04-21 W. Badeghaish, A. Wagih, S. Rastogi, G. Lubineau
Polyether ether ketone (PEEK) has replaced some parts in downhole applications in the oil and gas industry, demonstrating a huge potential to eliminate the corrosion of metallic parts, especially those that are employed in acidic atmospheres and high temperatures, such as liners, impeller, and sealing applications. However, the performance of PEEK in real downhole conditions remains unknown. In this
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Superior interface adhesion and protective mechanism of room-temperature-curable polymer composite coating on engineering substrates with lower roughness Polym. Test. (IF 5.1) Pub Date : 2024-04-19 Yimin Luo, Shuaikang Liu, Yujie Yang, Guiying Chen, Liangyi Cai, Shushen Lyu, Zhuangzhu Luo, Caijiao Ai
In view of the technology bottleneck of the adhesion failure of traditional functional protective coatings on the smoother surface of precise parts served in the marine atmosphere, a room-temperature-curable fluoropolymer/polyurethane (denoted as RFP) polymer composite coating of 20–30 μm is prepared on the metal substrates. Static pull-off and dynamic friction test methods are used to evaluate the
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The distinctions of the interfacial nanostructures and properties between carbon fiber reinforced fast and conventional curing epoxy composites subjected to hydrothermal treatments Polym. Test. (IF 5.1) Pub Date : 2024-04-15 Yixin Qi, Dazhi Jiang, Su Ju, Jianwei Zhang
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Recycling of a commercial biodegradable polymer blend: Influence of reprocessing cycles on rheological and thermo-mechanical properties Polym. Test. (IF 5.1) Pub Date : 2024-04-13 Irene Bavasso, Maria Paola Bracciale, Giovanni De Bellis, Alessia Pantaleoni, Jacopo Tirillò, Genny Pastore, Serena Gabrielli, Fabrizio Sarasini
Mechanical recycling is a viable option for reducing plastic waste, especially for post-consumer waste and scraps from production processes. Biodegradable polymers have gained attention as alternatives to conventional ones, and their potential for reprocessing using standard techniques before composting needs to be explored. This study focused on a commercial biodegradable polymer blend which underwent
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Preparation of hydrophobic hard gelatin capsules for slow-release fertilizers Polym. Test. (IF 5.1) Pub Date : 2024-04-12 Jingshun Liao, Yechun Lin, Mengxia Xu, Zhu Luo, Guanghua Jiang, Fayuan Chen, Hongxun Li, Lei Yang
In order to attenuate the pollution problem caused by low fertilizer utilization, a biodegradable urea slow-release capsule was prepared in this study using gelatin as the main material. Glycerol was added to the gelatin solution as a plasticizer, and the mechanical properties and water resistance of the gelatin film were enhanced by cross-linking with glutaraldehyde. The addition of nano-SiO (nSiO)
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Mechanical and abrasive wear properties of rape stalk reinforced polyvinyl chloride composites synergistically treated by alkali and ultrasound Polym. Test. (IF 5.1) Pub Date : 2024-04-09 Xi Zhang, Keping Zhang, Junqian Yang, Yanan Zhang, Dongsheng Chen, Zhongqing Yang
Rape stalk was synergistically pretreated by alkali and ultrasound and prepared rape stalk/PVC composites. The properties of composites were examined and the results showed that the composites synergistically treated by alkali and ultrasound demonstrated considerably increased in hardness, mechanical strength, thermal stability and wear resistance. Compare to composites treated with ultrasound, the
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Classification of diverse plastic samples by LIBS and Raman data fusion Polym. Test. (IF 5.1) Pub Date : 2024-04-09 Daniel Holub, Dávid Jenő Palásti, Krisztian Fintor, Pavel Pořízka, Gábor Galbács, Jozef Kaiser
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Influence of bio-based kenaf polymer composites on mechanical and acoustic properties for futuristic applications: An initiative towards net-zero carbon emissions Polym. Test. (IF 5.1) Pub Date : 2024-04-09 Vinoth Kumar Selvaraj, Jeyanthi Subramanian, Indran Suyambulingam, Shreya Viswanath, Elammaran Jayamani, Suchart Siengchin
In the pursuit of net-zero carbon emissions, the development of sustainable materials like kenaf fiber composites is pivotal. This innovative approach, which harnesses eco-friendly properties and enhances material performance, holds promise in reducing carbon footprints across diverse industries. As ecological sustainability awareness continues to rise, there is a growing imperative to embrace biodegradable
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Jute/PP composites for covering honeycomb panels: Designability and mechanical behaviors Polym. Test. (IF 5.1) Pub Date : 2024-04-04 Shaohua Gu, Cuicui Wang, Lee M. Smith, Haijun Zheng, Ge wang, Haitao Cheng
An approach involving low energy consumption was used to transform jute/polypropylene prepregs into a sustainable sandwich structure for automotive application. Fiber orientation and stacking sequence were modified to investigate their influence on the physical-mechanical properties of the prepregs as well as cyclic flexural properties, compression fatigue behaviors and 3D microstructure of honeycomb
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Modelling the non-isothermal curing kinetics of peroxide crosslinking polyolefin copolymers for photovoltaic module lamination Polym. Test. (IF 5.1) Pub Date : 2024-04-04 Gabriel Riedl, Martin Tiefenthaler, Gernot M. Wallner
This study presents a model for determining the non-isothermal curing kinetics of peroxide crosslinking polyolefin copolymers used for encapsulation of silicon solar cells in photovoltaic modules. Therefore, rheological data of ethylene vinyl acetate copolymer (EVA) and polyolefin elastomer (POE) were analyzed. The curing kinetics were described assuming a temperature dependent Arrhenius rate coefficient
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Facile synthesis of mechanically robust and injectable tetra-polyethylene glycol/methacrylate chitosan double-network hydrogel cartilage repair Polym. Test. (IF 5.1) Pub Date : 2024-04-03 Rui Chen, Xiaojie Yu, Weiheng Wang, Liang Zhu, Ronghua Yu, Guoke Tang, Xing Wang, Jiangming Yu
The development of advanced hydrogel scaffolds with good biocompatibility, mechanical strength and bioactive property is highly desirable in cell growth, proliferation, and differentiation for the cartilage tissue regeneration. Herein, we reported a simple, inexpensive, feasible, and environmentally benign strategy to synthesize a biocompatible polyethylene glycol-based methacrylate-modified chitosan
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Investigation into the state of cure of elastomers through nanoindentation Polym. Test. (IF 5.1) Pub Date : 2024-04-01 Jacopo Schieppati, Tobias Gehling, Mauricio Azevedo, Roman Christopher Kerschbaumer, Petra Christöfl, Gernot Oreski, Michael Andreas Fasching, Thomas Schwarz, Gerald Pinter
A novel nanoindentation procedure was developed for measuring the mechanical properties of elastomers as they exhibit surface tackiness. A small dynamic load was superimposed to a larger static deformation after a dwell time for allowing stress relaxation. The outcomes of measurements on a fully crosslinked filled acrylonitrile butadiene rubber (NBR) were analyzed to verify the reliability of this
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High-performance and economic biodegradable composites based on polybutylene adipate terephthalate and modified lignin Polym. Test. (IF 5.1) Pub Date : 2024-04-01 Van-Dung Mai, Gihyun Kwon, Yewon Jang, Jiho Min, Jee-hoon Han, Sung-Kon Kim
Polybutylene adipate terephthalate (PBAT) is a biodegradable polymer with promising properties, but its wide-spread application is limited by factors such as high cost, suboptimal mechanical characteristics, and slow biodegradation rate. In this study, these limitations are addressed by incorporating low-cost lignin, modified with an isocyanate compound, into PBAT via an extrusion process. By investigating
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Research on the adaptability of STF-Kevlar to ambient temperature under low-velocity impact conditions Polym. Test. (IF 5.1) Pub Date : 2024-04-01 Zhihao Xie, Yuyang Liu, Lulu Liu, Rui Feng, Wei Jiang, Wei Chen
Composite fabric formed by combining shear thickening fluid (STF) with aramid fabric (Kevlar) exhibits heightened impact resistance, rendering it extensively utilized within the realm of energy absorption. Given that composite fabrics often encounter various low-velocity impact scenarios in daily use, such as object falls, this study conducts rheological property tests and low-velocity impact experiments
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Anisotropic compression response of functionally gradient syntactic foam comprising of fly ash cenosphere and polyurethane Polym. Test. (IF 5.1) Pub Date : 2024-03-31 Zhiqiang Fan, Xiaopeng Yang, Yujian Guo, Yongxin Cui
A novel functionally gradient (FG) syntactic foam with hierarchical cell structure was prepared by incorporating fly ash cenosphere of different size distribution into rigid polyurethane foam (PUR). The mechanical anisotropic behavior was experimentally studied by axial and traverse compression, and the influence of density gradient on failure mechanism was discussed through digital image correlation
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Constitutive model of MWCNTs/PDMS composites considering volume change and electromechanical response characteristics under impact load Polym. Test. (IF 5.1) Pub Date : 2024-03-29 Mengzhou Chang, Mingyue Che, Yihao Liu, Kai Guo, Enling Tang
Multi-walled carbon nanotubes/polydimethylsiloxane (MWCNTs/PDMS) composites have excellent electromechanical conversion ability which can be applied in the field of intelligent sensing. However, the volume changes and electromechanical response mechanism of MWCNTs/PDMS under dynamic load remain unclear. In this paper, the electromechanical response of MWCNTs/PDMS with different mass ratio of MWCNTs
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Facile fabrication of Joule heating-induced highly elastic, durable, and reversible thermochromic wrapped yarn enabling stretchable dynamic colored displays Polym. Test. (IF 5.1) Pub Date : 2024-03-28 Yong Wang, Lizheng Zhang, Xinlan Bu, Mingkun Qi, Xinghua Hong, Mingwei Li, Wei Wang, Changlong Li
The colors of commercial textiles via dyeing or printing procedures were stationary, and these processes affect ecological environment. The existing thermochromic textiles via surface coating may involve poor permeability of vapor/air and inherent inelasticity, affected wearing comfort. Herein, we propose a facile and scalable fabrication strategy to manufacture Joule heating-induced elastic thermochromic
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Heading towards a fully sustainable tire tread compound: use of bio-based resins Polym. Test. (IF 5.1) Pub Date : 2024-03-27 Pilar Bernal-Ortega, Frances van Elburg, Javier Araujo-Morera, Hubert Gojzewski, Anke Blume
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Creep rapture of plastic pipes: Effect of eccentricity, residual stress, and circumferential orientation Polym. Test. (IF 5.1) Pub Date : 2024-03-26 Suleyman Deveci, Aisha Khaleel, Birkan Eryigit, Fatima AlHameli
Plastic pipes made of high density polyethylene material with known geometric eccentricities and residual stresses were subjected to long term hydrostatic stress until rupture at different stresses and temperatures. Cooling and crystallisation rates of the pipe wall during the extrusion process were simulated along the production line. Crystallisation profile and circumferential orientation of polymer
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Characterization of shear/tensile mechanical properties of three-dimensional-printed polylactic acid specimens based on orthogonal raster Polym. Test. (IF 5.1) Pub Date : 2024-03-25 Yuhong Ma, Yongxi Tian, Yulong He, Chunnan Jia, Buyun Su, Xuefeng Shu, Gesheng Xiao
With the wide application of three dimensional (3D)-printed products, related studies on 3D-printed materials with interleaved raster and subjected to complex stress states should receive sufficient attention. In this study, 3D-printed tensile specimens and two types of shear–tensile specimens with different printed angles were prepared by changing the distribution of internal orthogonal raster orientation
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Thermal-mechanical enhancement investigation of shape memory polymer nanocomposite for anti-/deicing Polym. Test. (IF 5.1) Pub Date : 2024-03-25 Long Chen, Xuweilai Ni, You Zhou, Yeqin Shen, Lei Qian
The oriented arrangement of graphene oxide (GO) and magnetic graphene oxide (MGO) in shape memory epoxy resin (EP) by employing the coupling effect of electric and magnetic fields were investigated. The heat transfer experiments showed that the thermal conductivity of the aligned shape memory MGO/GO/EP composites was 90.29% higher than that of the random doped composites. Through the two-dimensional
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Mathematical model for characterization of temperature-responsive polymers: A study on the rheological behavior of gelatin and poly(N-isopropylacrylamide) Polym. Test. (IF 5.1) Pub Date : 2024-03-25 Tilen Kopač
This study introduces a mathematical model for detailed characterization of temperature-responsive polymers, focusing on critical temperature, viscosity, storage modulus, their rate of change in the transition region, flow behavior, and potential hysteresis. Applied to gelatin (GEL) and poly(N-isopropylacrylamide) (pNIPAm), the model analyzes their rheological responses across various temperatures
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Evaluating the single-shot photodegradation of optically-transparent bulk polymers under two-photon Raman-resonant laser irradiation in nanosecond regime (multiplex CARS test) Polym. Test. (IF 5.1) Pub Date : 2024-03-23 Georgi B. Hadjichristov, Ivan L. Stefanov
Laser-induced photodegradation of bulk optically-transparent polymers was probed under laser irradiation at two-photon Raman resonance. The photodegradation effect was inspected for organic polymers poly-(methyl methacrylate) and polystyrene by means of single-shot multiplex coherent anti-Stokes Raman scattering (CARS) spectroscopy performed with nanosecond-pulsed laser sources. Under such conditions
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Enhanced side illumination property of end emitting polymer optical fiber (EEPOF)/polyester (PET) woven fabrics by acetone/methanol mixture etching process Polym. Test. (IF 5.1) Pub Date : 2024-03-21 Xiuling Zhang, Jan Kallweit, Mark Pätzel, Kai Yang, Dana Kremenakova, Jakub Wiener, Jana Müllerová, Maros Tunak, Jiri Militky
The rapid development of fiber optic technology has enriched smart wearable technology. Standard (end emitting) polymer optical fibers (EEPOF) are linear and flexible, which is feasible to integrated them into textiles and applied to curved parts of the human body for achieving individualized functionality (e.g., safety light-emitting garments, wearable photo-therapeutic textiles, fashionable displays
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Stretch-induced softening in filled elastomers: A review on Mullins effect related anisotropy and thermally induced recovery Polym. Test. (IF 5.1) Pub Date : 2024-03-15 Isabella Denora, Claudia Marano
The of filled elastomers, corresponding to their softening under stretching, has been widely explored and several models have been proposed to reproduce it. However, the observed anisotropy in the material mechanical response induced by a stretch and the thermally induced recovery of the pristine material behaviour are two aspects of the phenomenon that are difficult to model. In this review, an update
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A nondestructive method using X-ray micro computed tomography for variation analysis of bamboo nodes’ vascular bundle among species Polym. Test. (IF 5.1) Pub Date : 2024-03-15 Jiulong Xie, Yingyue He, Jinqiu Qi, Qi Chen
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Novel hyper-viscoelastic approach to modelling elastomer mechanic behaviour with relaxation spectrum Polym. Test. (IF 5.1) Pub Date : 2024-03-13 Penghao Pei, Yueming Du, Yinggang Miao, Tao Suo
Elastomers, such as polyurethane, exhibit hyperelastic behaviour and distinct rate dependence under a wide range of strain rates. Herein, a methodology for developing a hyper-viscoelastic constitutive model for succinctly characterising the mechanical behaviour of polyurethane under large deformations and a wide range of strain rates is proposed. The model is constructed using a long-term hyperelastic
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A novel geometric predictive algorithm for assessing compressive elastic modulus in MEX additive processes, based on part nonlinearities and layers stiffness, validated with PETG and PLA materials Polym. Test. (IF 5.1) Pub Date : 2024-03-11 Jorge Manuel Mercado–Colmenero, Cristina Martin–Doñate
MEX (Material Extrusion) is an intrusive technological process that inherently induces alterations in the elastic and mechanical parameters of plastic materials. Manufacturers provide initial mechanical parameters for plastic filaments, which undergo modifications during MEX manufacturing, influenced by intrinsic manufacturing factors such as temperature and pressure changes, as well as geometric and
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Tough hyperbranched polyaryletherketone-based photosensitive resins bearing excellent dielectric property and thermal resistence Polym. Test. (IF 5.1) Pub Date : 2024-03-06 Lingmei Jiang, Guangsheng Zhang, Kuanyu Yuan, Chenghao Wang, Haoran Liu, Changhong Xiao, Hao Sun, Xiaoxu Wang, Lishuai Zong, Jinyan Wang, Xigao Jian
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Influences of printing parameters on mechanical properties of recycled PET and PETG using fused granular fabrication technique Polym. Test. (IF 5.1) Pub Date : 2024-03-04 Phan Quoc Khang Nguyen, Jojibabu Panta, Tosin Famakinwa, Richard (Chunhui) Yang, Aziz Ahmed, Michael Stapleton, Doug Sassaman, Samantha Snabes, Charlotte Craff
This research presents an investigation of the feasibility of recycled polyethylene terephthalate (rPET) and glycol-modified polyethylene terephthalate (rPETG) thermoplastics using the fused granular fabrication (FGF) 3D printing technique. It focuses on the effects of FGF printing parameters on the mechanical properties of rPET and rPETG printed parts using a Gigabot X 3D printer. The design of experiments
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Construction of high-performance solid-state electrolytes for lithium metal batteries by UV-curing technology Polym. Test. (IF 5.1) Pub Date : 2024-03-03 Zengxu Chen, Yongquan Zhang, Baoshan Zhu, Jingshun Wang, Jingrun Hu, Jianxin Zou, Zhao Jin, Xinhe Li, Yue Zhang, Changhai Zhang
With high energy density and high safety, all-solid-state lithium metal batteries (ASSLMBs) are considered the most competitive next-generation energy storage batteries. In this work, different formulations of PEGDA-based solid-state electrolytes were prepared by solution flow casting and UV-irradiated in situ polymerization. Polyethylene oxide (PEO) was introduced to solve the problem of improving
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Compression testing of EPP bead foams in a vacuum chamber: Experimental investigation on the influence of the cell gas Polym. Test. (IF 5.1) Pub Date : 2024-03-01 J. Meuchelböck, I. Koch, B. Grüber, M. Müller-Pabel, M. Gude, H. Ruckdäschel
In this study, we systematically investigate the compression behavior of Expanded Polypropylene (EPP) bead foams using precise experiments in a custom-designed vacuum chamber. The material’s response is examined under controlled pressure conditions, including compression tests at both ambient pressure and 4 mbar, at various strain rates. Considering that most foams consist of more than 90% air, our
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Real-time char layer resistance monitoring for the study of expanded char layer morphology formed by IFR/SBS during combustion processes Polym. Test. (IF 5.1) Pub Date : 2024-02-29 Jiale Huo, Xiping Gao, Dahu Yao, Chang Lu, Yingzi Liu, Zhuoyan Yang
Intumescent flame retardants (IFR) are used to improve the flame retardancy of polymers through the formation of an expanded char layer. However, there is no method that can be used to detect the morphological evolution of the expanded char layer during combustion in real time. Flame ablation of the surface of IFR flame retardant polymers produces an expanded char layer containing monomeric carbon
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Testing trap states in polymer solar cells Polym. Test. (IF 5.1) Pub Date : 2024-02-28 Zesheng Liu, Yuze Lin
Polymer/organic solar cells (PSCs) are one promising candidate for sustainable technologies of converting solar energy to electricity, making impressive progress with the power conversion efficiencies of single-junction devices exceeding 18–19%. The trap density of states (tDOS) of polymer/organic semiconductors ranging from 10∼10 cm are much higher than those traditional inorganic/hybrid semiconductors
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Formulating PBS/PLA/PBAT blends for biodegradable, compostable packaging: The crucial roles of PBS content and reactive extrusion Polym. Test. (IF 5.1) Pub Date : 2024-02-24 Sarocha Chuakhao, Juan Torres Rodríguez, Somjit Lapnonkawow, Gokul Kannan, Alejandro J. Müller, Supakij Suttiruengwong
The use of biodegradable polymers such as Poly (lactic acid) (PLA), Poly(butylene succinate) (PBS), and Poly(butylene adipate--terephthalate) (PBAT) is constantly increasing to try to substitute non-biodegradable plastics. Blending is a viable option to improve the morphology and the mechanical and heat resistance properties of biodegradable polymers. Thus, in this work, a biodegradable and compostable
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Dynamic enhancement induced by interface for additively manufactured continuous carbon fiber reinforced composites Polym. Test. (IF 5.1) Pub Date : 2024-02-16 Lanting Liu, Qiong Deng, Ruifeng Wang, Xiaobin Hu, Mengjia Su, Minrong An, Yongshuai Wang, He He, Yinggang Miao
Additive manufacturing (AM) has become one advanced manufacturing method for continuous carbon fiber reinforced polymer (CCFRP) composites, which is promising to work as aerospace materials. To promote their efficient design and extensive application, series of tensile and fiber-pullout tests were implemented to investigate the rate-dependent mechanical behavior and fracture mechanism. Both tensile
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Homogeneous oriented magnetic field for developing biaxial fractal-like magnetorheological materials Polym. Test. (IF 5.1) Pub Date : 2024-02-15 Luis M. Palacios-Pineda, J. Luis Gómez-Color, Enrique Melgoza-Vázquez, Imperio A. Perales-Martínez, Jorge A. Estrada-Díaz, Oscar Martínez-Romero, Alex Elías-Zúñiga
This research describes the design and fabrication of an electromagnetic quadrupole installed inside a biaxial tensile test bench to induce magnetic field effects whose orientation can be adjusted to either 45° or 90° to develop magnetorheological elastomer (MRE) materials subjected to a biaxial stress condition. The objective of the quadrupole is to generate a homogeneous and oriented magnetic field
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Advanced analysis of ethylene vinyl acetate copolymer materials for photovoltaic modules Polym. Test. (IF 5.1) Pub Date : 2024-02-14 Gary Säckl, Gernot M. Wallner, Jiri Duchoslav, Martin Tiefenthaler, David Stifter
Ethylene vinyl acetate (EVA) copolymers are commonly used as encapsulation material and as adhesive layer for backsheet laminates of photovoltaic (PV) modules. While Fourier-Transform Infrared spectroscopy (FTIR) and Differential Scanning Calorimetry (DSC) are well established to analyse EVA encapsulants in PV modules, X-ray Photoelectron Spectroscopy (XPS) is seldomly used. Hence, the objective of
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Additive manufacturing in polymer research: Advances, synthesis, and applications Polym. Test. (IF 5.1) Pub Date : 2024-02-13 Md Aminul Islam, Md Hosne Mobarak, Md Israfil Hossain Rimon, Md Zobair Al Mahmud, Jubaraz Ghosh, Md Mir Shakib Ahmed, Nayem Hossain
This study delves into how additive manufacturing has revolutionized the production of polymers over the last three decades. Traditional polymer production finds it difficult to fulfill the demanding needs of a wide range of applications, even as it faces issues with environmental sustainability and decreased plastic waste. On the other hand, AM provides unmatched design freedom, expedited time-to-market
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The essential role of aligned architecture in decellularized tendon matrix mediated stem cell tenogenic differentiation and tendon repair Polym. Test. (IF 5.1) Pub Date : 2024-02-13 Heyong Yin, Yufei Ding, Honggang Yan, Jitao Zhang, Bin Zhu, Lin Shi, Ai Guo
Decellularized tendon matrix (DTM) has shown great potential for inducing tenogenic differentiation and facilitating tendon repair. In which, the retained native tendon-derived matrix in DTM is considered as the main factor for these effects. However, whether preservation of the highly aligned architecture of DTM is also essential for tenogenic differentiation and tendon repair has not been well investigated
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Surface flame retardancy of clay mineral powder infused onto the top of the layer of vinyl ester/bamboo composites through a modified VARTM process Polym. Test. (IF 5.1) Pub Date : 2024-02-13 Prabhakar M.N., Maurelio C. Cabo Jr., Ruiwen Yu, Teklebrahan Gebrekrstos Weldemhret, Lee Dong Woo, Song Jung-il
The mechanical properties of fire-resistant biocomposites are significantly compromised owing to the high amounts of flame retardants (FRs) required for satisfactory results and the limited interfacial interactions between flame retardants (FRs) and polymer/natural fibers. The study addresses these challenges by modifying the vacuum-assisted resin transfer molding (VARTM) process to include two inlets
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Reinforcement of nanostructured polyacrylamide hydrogels through the generation of secondary physical network using the nanoparticles’ functional groups Polym. Test. (IF 5.1) Pub Date : 2024-02-13 Elena Olaret, Brindusa Balanuca, Jana Ghitman, Izabela-Cristina Stancu, Andrada Serafim
The main drawback regarding hydrogels utilization in biomedical engineering is represented by their weak mechanical properties and it is often addressed either by using nanospecies as fillers or by generating secondary networks that strengthen the material. Our study validates a new synthesis route of obtaining double-network nanostructured materials making use of the functional groups of an adsorbed
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Adapted sterilisation for the production of thermoresponsive hydrogels for downstream wound healing applications Polym. Test. (IF 5.1) Pub Date : 2024-02-13 Daniel P. Fitzpatrick, Carmel Kealey, Damien Brady, Noel Gately
Complex wounds can have a significant impact on a patient's life; affecting them physically, emotionally, and socially. A potential reason for these varied success of treatment outcomes could be attributed to the multifactorial interplay between genetic, immune-related, environmental, and microbial persistence factors on tissue regeneration. The amelioration of persistent factors has become a target
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Splitting tensile properties and damage characterization of polymer grouting materials: Density, geometry and size effects Polym. Test. (IF 5.1) Pub Date : 2024-02-11 Yangyang Xia, Bin Lu, Jing Wang, Yongshen Wu, Youbin Gao, Chao Zhang, Cuixia Wang, Peng Zhao, Hongyuan Fang, Jianguo Zhang, Bing Li, Mingsheng Shi
Splitting tensile properties play a crucial role in evaluating the safety of polymer grouting reinforced underground infrastructure. However, the influence of density, geometry and size effects on splitting tensile properties is remains unclear. This study employed static splitting tensile and Brazilian disc tests to investigate these influences, analyzing the damage evolution process of polymer grouting
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A novel determination of the melt flow index of composite filaments used in extrusion additive manufacturing Polym. Test. (IF 5.1) Pub Date : 2024-02-10 Fedor Doronin, Anna Rudakova, Georgy Rytikov, Victor Nazarov
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Measuring large tensile deformation of polymers using fluorescent 3D-digital image correlation with adaptive incremental calculation strategy Polym. Test. (IF 5.1) Pub Date : 2024-02-10 Haotian Yang, Bing Pan
Digital image correlation (DIC) techniques have been widely used for experimentally characterizing the mechanical behavior of polymer materials. However, practical applications of DIC for tensile testing of polymers often face serious image decorrelation caused by crazing and excessive deformation. In this work, a fluorescent three-dimensional digital image correlation (3D-DIC) with an adaptive incremental
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Influence of ethylene oxide and gamma irradiation sterilization processes on the degradation behaviour of poly(lactic acid) (PLA) in the course of artificially accelerated aging Polym. Test. (IF 5.1) Pub Date : 2024-02-10 Natalie Krug, Jan-Christoph Zarges, Hans-Peter Heim
To promote the application of bio-based materials in the field of medical technology, it is essential to conduct additional research, focusing on their long-term performance after sterilization. For this purpose, the study examines the aging behaviour of three poly(lactic-acid) (PLA) materials, sterilized with either ethylene oxide or gamma irradiation, over a two years aging period, in accordance
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A comparison of calculation methods for the diffusion coefficient as a potential tool for identifying material alteration with time Polym. Test. (IF 5.1) Pub Date : 2024-02-10 Hamad Raheem, Bernadette Craster, Ashwin Seshia
This article addresses the calculation of diffusion coefficients of CO gas through PE-RT from continuous sweep permeation tests after different run times. Knowing the permeability and diffusion coefficients allows the solubility and concentration in the polymer film to be calculated. Other permeation methods used more often in engineering applications such as the closed cell manometric method traditionally
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A highly resilient conductive eutectogel with multi-environmental adaptability for strain sensor Polym. Test. (IF 5.1) Pub Date : 2024-02-09 Weiwei Zhang, Leyu Dai, Chenhua Yang, Wanrong Xu, Chuanxiang Qin, Jianjun Wang, Jun Sun, Lixing Dai
Compared to traditional hydrogels and ionogels, eutectogels have shown extraordinary potential in wearable electronics. However, it remains a great challenge for eutectogels to achieve excellent adaptability under various environments. Herein, a highly resilient conductive eutectogel with extraordinary long-term environmental adaptability was fabricated via photopolymerization of acrylamide (AM) in
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Boosting holographic properties and conversion of epoxy resin and triacrylate photopolymer by inhibition effect of CeO2 nanorods in polymerization process Polym. Test. (IF 5.1) Pub Date : 2024-02-08 Yourong Liu, Tong Shen, Ning Zhu, Ke Li, Zengrong Zheng, Shaoxing Li, Jihong Zheng
Through the preparation of free radicals and nanocomposite materials technology, this article introduces the Cerium oxide (CeO) nanorods doped trimethylpropane triacrylate and epoxy resin to solve the poor performance of holographic photopolymer. Dielectric analysis and spectrum data show that the incorporation of CeO nanorod can serve as an inhibitor to interfacial interaction with Irgacure 784, and
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Study on resistance of polyurea coated metal plates to gas explosions Polym. Test. (IF 5.1) Pub Date : 2024-02-08 Meng Gu, Haozhe Wang, Anfeng Yu, Hanxiang Wang, Guoxin Chen, Junhai Li
Field gas explosion experiments were conducted on two types of polyurea coated metal plates (PCMPs). The explosion resistance performance of PCMP were quantified based on failure criteria and relative deformation. The failure mechanism of PCMP was analyzed from the perspective of stress propagation and polyurea phase transition. The results showed that under the fluctuating upward gas explosion load
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Biodegradation behavior of polyesters with various internal chemical structures and external environmental factors in real seawater Polym. Test. (IF 5.1) Pub Date : 2024-02-08 Mira Shin, Hyeri Kim, Soyoun Kim, Hyo Jeong Kim, Dongyeop X. Oh, Jeyoung Park
Releasing non-degradable plastics into the oceans contributes to ghost fishing and microplastic generation, thus increasing the interest in biodegradable alternatives. However, biodegradable plastics decompose slowly in marine environments, and understanding how their chemical structure influences their degradation behavior in the oceans is a growing focus. Herein, we investigated the effects of intrinsic
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Investigation of the bonding behavior between thermosets and thermoplastic elastomers in multi-material additive manufacturing Polym. Test. (IF 5.1) Pub Date : 2024-02-08 Robert Setter, Katrin Wudy
Multi-material additive manufacturing (AM) pushes the boundaries of modern processing by creating parts with synergetic material-related effects and superior properties. A promising technology is represented by the so-called fusion jetting (FJ) process which simultaneously combines thermosets and thermoplastics into multi-material AM parts. However, the bonding behavior between thermoset-reinforced
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Mesoscopic failure behavior of HTPB propellant bonding interface under multi-angle pull-and-shear loading Polym. Test. (IF 5.1) Pub Date : 2024-02-07 Shudi Pei, Hongfu Qiang, Xueren Wang, Shiqi Li
This study aims to investigate the in-situ microscopic damage evolution mechanism of the hydroxyl-terminated polybutadiene (HTPB) propellant bonding interface under multi-angle tensile shear conditions as well as to characterize the effects of the microscopic damage on the macroscopic failure modes. To this end, micro-specimens of the HTPB bonding interface with different loading angles are scanned
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Investigation of effects induced by 57 MeV 56Fe ions and 9 MeV protons on additively manufactured PEKK for space application Polym. Test. (IF 5.1) Pub Date : 2024-02-07 Kaifur Rashed, Abdullah Kafi, Ranya Simons, Stefania Peracchi, Zeljko Pastuovic, Christopher D. Easton, Stuart Bateman
Additive manufacturing (AM) has progressed from rapid prototyping to rapid manufacturing of equipment for various industries, including the space industry, where polymer-based techniques like Material extrusion (MEX) are particularly interesting. Polyetherimide (PEI), Poly ether ether ketone (PEEK) and Poly ether ketone ketone (PEKK) are frequently chosen to manufacture end use equipment in MEX due
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Study of self-heating and local strain rate in polyamide-6 and short fibre glass/polyamide-6 under tension through synchronised full-field strain and temperature measurements Polym. Test. (IF 5.1) Pub Date : 2024-02-05 Daniele Finazzi, Yuriy Sinchuk, Ruben D.B. Sevenois, Lode Daelemans, Karen De Clerck, Gilles Robert, Wim Van Paepegem
This paper studies thermomechanical coupling during room-temperature tensile testing of polyamide-6 (PA6) and 50 wt% short glass fibre/PA6. The tests were performed for different fibre angles (0°, 45°, 90°), moisture contents (dry, 50%RH), and strain rates (, , ). Digital image correlation (DIC) was coupled with infrared thermography. The contribution of the local strains, strain rates and temperatures
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Experimental investigation of long-term performance of fiber-reinforced epoxy and polyurethane polymer composites Polym. Test. (IF 5.1) Pub Date : 2024-02-05 Abdel-Hamid I. Mourad, Amir Hussain Idrisi, Asima Zahoor, Muhammad M. Sherif, Beckry M. Abdel-Magid
The primary challenge encountered by polymers and their composites when exposed to saline water is their inadequate ability to withstand wear and tear over time. With a potential to replace conventional materials the long-term performance of FRP composites is still a novice area. This manuscript thus, reports an experimental investigation and prediction of the durability of fiber-reinforced polymer
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A novel approach for accurate determination of polyethylene and polypropylene content in polyolefin blends and recyclates by cross-fractionation chromatography Polym. Test. (IF 5.1) Pub Date : 2024-01-30 Magdalena Góra, Davide Tranchida, Andreas Albrecht, Alejandro J. Müller, Dario Cavallo
The accurate characterization of post-consumer recycled (PCR) polyethylene (PE) and polypropylene (PP) blends is essential for repurposing them into higher-demand applications. This study improves the accuracy of the Temperature Rising Elution Fractionation coupled with Gel Permeation Chromatography (TREFxGPC) approach for both virgin and post-consumer recycled PP/PE blends. Model blends and virgin
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Method for assessing the biodegradation of poly(lactic acid) in vitro (on agar plates): Application using PLA oligomers and Bacillus licheniformis vegetative cells or spores Polym. Test. (IF 5.1) Pub Date : 2024-02-01 Pragadiswary Durairaju, Lynda Bouarab, Amandine Cottaz, Stella Planchon, Nadia Oulahal, Catherine Joly