The present research effort employs glycolysed polyethylene terephthalate (PET) bottle waste as a precursor for the synthesis of unsaturated polyester resin (rUPR). This resin is then used for manufacturing composites that are reinforced with jute fibres using the sheet moulding compound technique. The limited crosslinking of styrene in the rUPR was elucidated using a combination of differential scanning calorimetry (DSC) and Fourier transform infrared spectroscopy (FTIR) analysis. The elevated exothermic reaction energy of 1152 kJ and the clearly identifiable peak observed at 1620 cm−1 in the Fourier Transform Infrared (FTIR) spectrum provided substantial evidence for this phenomenon. Additionally, the X-ray diffraction (XRD) analysis indicated that the recycled unsaturated polyester resin (rUPR) demonstrated a higher level of amorphous nature This observation can be attributed to reduced viscosity and enhanced ductility of rUPR. The utilisation of the rUPR as a matrix material has shown significant effectiveness in enhancing the tensile and flexural properties of composites reinforced with jute fibres. Thereby, the objective of this research is to develop a thermoset resin using recycled polyethylene terephthalate (rUPR) waste material for identification its suitability in manufacturing composites with jute fibres as reinforcement.

中文翻译：

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使用聚对苯二甲酸乙二醇酯瓶废料作为合成不饱和聚酯树脂的可行前体来制造黄麻纤维增强复合材料

目前的研究工作利用乙二醇解聚对苯二甲酸乙二醇酯（PET）瓶子废料作为合成不饱和聚酯树脂（rUPR）的前体。然后，该树脂用于制造复合材料，并使用片状模塑料技术用黄麻纤维增强。结合差示扫描量热法 (DSC) 和傅里叶变换红外光谱 (FTIR) 分析，阐明了 rUPR 中苯乙烯的有限交联。放热反应能量高达 1152 kJ，在 1620 cm-1 处观察到清晰可辨的峰−1傅里叶变换红外（FTIR）光谱为这一现象提供了充分的证据。此外，X 射线衍射 (XRD) 分析表明，回收的不饱和聚酯树脂 (rUPR) 表现出更高水平的无定形性质。这一观察结果可归因于 rUPR 的粘度降低和延展性增强。使用 rUPR 作为基体材料在增强黄麻纤维增强复合材料的拉伸和弯曲性能方面显示出显着的有效性。因此，本研究的目的是利用回收的聚对苯二甲酸乙二醇酯（rUPR）废料开发一种热固性树脂，以确定其在制造以黄麻纤维作为增强材料的复合材料中的适用性。