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首页> 外文期刊>Journal of Applied Polymer Science >Some new operational modes and parameters of stress relaxation for the viscoelastic characterization of solid polymers. III. The area ratio mode and the intrinsic 'strain-clock' function
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Some new operational modes and parameters of stress relaxation for the viscoelastic characterization of solid polymers. III. The area ratio mode and the intrinsic 'strain-clock' function

机译：固体聚合物粘弹性表征的一些新的操作模式和应力松弛参数。三，面积比模式和固有的“应变时钟”功能

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The introduced area ratio mode of operation with its corresponding parameters seems to have a fairly high sensitivity to the viscoelastic response of the solid polymer. This appeared from the fact that a good distinction among the linear viscoelastic, the nonlinear viscoelastic, and the viscoplastic ranges of behavior can be made. By using a relevant rheological modeling and its corresponding algorithmical approach, in the case of isotactic polypropylene, this material can be characterized as a morphological three-phase material consisting of an intraspherulitic crystalline, an amorphous phase, and a interspherulitic para-crystalline phase. In this sense, the material was simulated using two models: the Poynting-Thomson and the Maxwell-Wierchert, from where a good response of the material to the first model appeared. The so-called intrinsic "strain- clock" function and its corresponding coefficient of strength of nonlinear viscoelastic behavior, which were relieved by the experimental data, seem to be some powerful and very practical "tools" that can give a proven suplementary characterization of the material. Finally, by this intrinsic function, the existence of permanent internal stresses, was confirmed, in an indirect way, which was mentioned in part II of this study. (C) 2002 Wiley Periodicals, Inc. [References: 10]
机译：引入的面积比操作模式及其相应参数似乎对固体聚合物的粘弹性响应具有相当高的敏感性。这是因为可以很好地区分线性粘弹性，非线性粘弹性和粘塑性行为范围。通过使用相关的流变学模型及其相应的算法方法，在全同立构聚丙烯的情况下，该材料可以表征为形态学上的三相材料，其由球内结晶相，非晶相和球间副结晶相组成。从这个意义上讲，使用两种模型对材料进行了模拟：Poynting-Thomson模型和Maxwell-Wierchert模型，从中出现了材料对第一个模型的良好响应。实验数据消除了所谓的固有“应变时钟”函数及其相应的非线性粘弹性行为的强度系数，这似乎是一些功能强大且非常实用的“工具”，可以证明该模型具有补充性。材料。最后，通过这种内在功能，间接证实了永久性内部应力的存在，这在本研究的第二部分中已经提到。 （C）2002 Wiley Periodicals，Inc. [参考：10]

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