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首页> 外文期刊>Journal of Applied Polymer Science >Effects of reprocessing on the structure and mechanical properties of poly(trimethylen terephthalate)
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Effects of reprocessing on the structure and mechanical properties of poly(trimethylen terephthalate)

机译：后处理对聚对苯二甲酸三亚甲基酯的结构和力学性能的影响

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摘要

The effects of reprocessing by extrusion for up to four cycles on the structure and mechanical properties of poly(trimethylene terephthalate) (PTT) were studied. Reprocessing did not change the chemical structure of the polymer but led to both yellowing and molecular weight reduction. Young's modulus and the yield stress of PTT remained constant or decreased with successive extrusion cycles, probably because of the observed slight specific volume increase. The continuous reduction in the break properties due to reprocessing was smaller than that found in similar polyesters and was attributed to the molecular weight reduction. (C) 2002 Wiley Periodicals, Inc. [References: 30]
机译：研究了通过挤压进行多达四个循环的后处理对聚对苯二甲酸丙二醇酯（PTT）的结构和力学性能的影响。再加工不会改变聚合物的化学结构，但会导致黄变和分子量降低。 PTT的杨氏模量和屈服应力在连续的挤出循环中保持恒定或降低，这可能是因为观察到的比容略有增加。由于再加工而导致的断裂性能的连续降低小于在类似聚酯中发现的断裂性能，这归因于分子量的降低。 （C）2002 Wiley Periodicals，Inc. [参考：30]

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