Mechanical properties are essential for polyester materials due to their widespread applications as fibers, films, and engineering accessories. The copolymerization strategy has been developed to enhance polyester properties, but facile-synthesized new materials are still under discovery. In this work, we designed a series of terminal functioned polyesters, for introducing plasticization effects and π-π stacking interactions. The fabrication process can be one-pot achieved melting polycondensation method. The prepared modified polyesters exhibit significantly improved elongation of break (560%), which is 104% improved compared with pristine poly(ethylene terephthalate). Meanwhile, the maximum toughness reaches 206.1 MJ/m. The thermal properties, viscoelastic properties, crystallinity properties, and fracture morphologies of the as-prepared polyesters are investigated as well. Results show that great elongation of break, higher crystallinity, and good processability are achieved simultaneously. This work provides a one-pot fabricated terminal functioned polyester with advanced tensile properties, expanding its potential application as engineering materials.

中文翻译：

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基于塑化和 π-π 堆积效应，具有改进的拉伸性能的末端改性聚酯

由于聚酯材料作为纤维、薄膜和工程配件的广泛应用，机械性能对于聚酯材料至关重要。共聚策略已被开发来增强聚酯性能，但易于合成的新材料仍在发现中。在这项工作中，我们设计了一系列末端官能化聚酯，用于引入增塑效应和π-π堆积相互作用。其制备工艺可采用熔融缩聚法一锅法实现。所制备的改性聚酯的断裂伸长率显着提高（560%），与原始聚对苯二甲酸乙二醇酯相比提高了104%。同时，最大韧性达到206.1 MJ/m。还研究了所制备聚酯的热性能、粘弹性性能、结晶性能和断裂形貌。结果表明，同时实现了较大的断裂伸长率、较高的结晶度和良好的加工性能。这项工作提供了一种具有先进拉伸性能的一锅法制备的末端功能聚酯，扩大了其作为工程材料的潜在应用。