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首页> 外文期刊>Journal of Applied Polymer Science >Mechanical properties in torsion for poly(butylene terephthalate) and a poly(ether ester) based on poly(ethylene glycol) and poly(butylene terephthalate)
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Mechanical properties in torsion for poly(butylene terephthalate) and a poly(ether ester) based on poly(ethylene glycol) and poly(butylene terephthalate)

机译：聚对苯二甲酸丁二醇酯和基于聚乙二醇和聚对苯二甲酸丁二醇酯的聚醚酯的扭转力学性能

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The torsional behavior of poly(ether ester) (PEE) thermoplastic elastomer, based on poly(ethylene glycol) (PEG) and poly(butylene terephthalate) (PBT) was studied and compared with that of PET itself. Two types of experiments were performed: (1) stress relaxation in torsion, and (2) measurement of intermittent couple-twist responses. It was shown that the relaxation of the torsional couple M could be represented as a sum of several exponential terms in the time, rather than as a simple exponential function. This sum might be called a Prony series on the analogy of the usual stress relaxation which occurs after stretching a sample to a certain deformation and holding it constant. The intermittent couple-twist experiments were carried out by analogy with similar experiments in elongation. For PEE the couple rises steadily with the twist, whereas for PET it rises abruptly and remains constant within the experimental error for high twists. The residual twist, however, showed a similar trend for both PEE and PET. (C) 1998 John Wiley & Sons, Inc. [References: 18]
机译：研究了基于聚乙二醇（PEG）和聚对苯二甲酸丁二酯（PBT）的聚醚醚（PEE）热塑性弹性体的扭转性能，并将其与PET本身的扭转性能进行了比较。进行了两种类型的实验：（1）扭转应力松弛，和（2）测量间歇性扭扭响应。结果表明，扭转副M的弛豫可以表示为时间上几个指数项的总和，而不是简单的指数函数。这个总和可以被称为Prony级数，类似于通常的应力松弛，该应力松弛是在将样品拉伸到一定变形并保持恒定之后发生的。类似于在伸长率方面的类似实验，进行了间歇性的双捻实验。对于PEE，这对夫妇随着扭曲而稳定地上升，而对于PET，它突然上升并且在高扭曲的实验误差范围内保持恒定。然而，残余扭曲对PEE和PET都显示出相似的趋势。 （C）1998 John Wiley＆Sons，Inc. [参考：18]

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