Abstract Polyesters based on 2,5-furan dicarboxylic acid are a new class of biobased polymers with properties superior of those of their fossil-based homologues. However, similarly to poly(ethylene terephthalate) (PET), poly(ethylene 2,5-furan dicarboxylate) (PEF) degrades during its thermal processing and as a result its molecular weight drops, and discoloration occurs. This is mainly attributed to thermal and thermo-oxidative degradation reactions. The addition of several types of thermal stabilizers during the synthesis or the processing of thermoplastic polyesters is a common practice. In this work, a commercial phenolic antioxidant (Irganox 1098), and two phosphorus-containing thermal stabilizers (phosphoric acid and triphenyl phosphate) were added in PEF polyester during synthesis with the use of antimony acetate catalyst. The effect of these additives on the molecular weight, thermal properties, thermal, thermo-oxidative stability and physical aging of PEF was evaluated. It was found that all additives slightly improved the thermal stability of PEF, with phosphoric acid and mainly triphenyl phosphate being the most efficient ones.

中文翻译：

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添加剂对聚呋喃乙烯酯生物基聚酯热稳定性和热氧化稳定性的影响

摘要 基于 2,5-呋喃二羧酸的聚酯是一类新型的生物基聚合物，其性能优于基于化石的同系物。然而，与聚（对苯二甲酸乙二醇酯）（PET）类似，聚（2,5-呋喃二甲酸乙二醇酯）（PEF）在其热处理过程中会降解，因此其分子量会下降，并会发生变色。这主要归因于热和热氧化降解反应。在热塑性聚酯的合成或加工过程中添加几种类型的热稳定剂是一种常见的做法。在这项工作中，在合成过程中使用醋酸锑催化剂在 PEF 聚酯中加入了一种商业酚类抗氧化剂（Irganox 1098）和两种含磷热稳定剂（磷酸和磷酸三苯酯）。评估了这些添加剂对 PEF 的分子量、热性能、热、热氧化稳定性和物理老化的影响。发现所有添加剂都略微提高了 PEF 的热稳定性，其中磷酸和主要是磷酸三苯酯是最有效的。