Roles of repeating-unit interactions in the stress relaxation process of bulk amorphous polymers

Roles of repeating-unit interactions in the stress relaxation process of bulk amorphous polymers
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重复单元相互作用在本体非晶聚合物应力松弛过程中的作用

DOI:
10.1016/j.polymer.2021.123740
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发表时间:
2021-04
期刊:
影响因子:
4.6
通讯作者:
Hu Wenbing
Hu Wenbing
中科院分区:
化学2区
文献类型:
--
作者:
Wang Jiping;Yu Yihuan;Guo Yaqian;Luo Wen;Hu Wenbing

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重复单元化学如何支配聚合物的粘弹性仍然不清楚。我们采用了四套相互作用参数来代表热力学和动力学方面的本地链内和链间的相互作用单体,其特征聚合物重复单元化学。我们进行了动力学Monte Carlo模拟德拜应力松弛拉伸和平行排列的大块非晶聚合物和评估的相对重要性,每个相互作用的扩散能量来自他们的Arrhenius流体行为。结果表明,在相同的强度下,链内和链间相互作用的动力学方面比热力学方面提高了更高的扩散能。我们讨论了聚乙烯的例子。我们的工作为预测大块非晶聚合物力学性能的结构-性能关系铺平了道路。
How the repeating-unit chemistry dominates polymer viscoelasticity remains as unclear. We employed four-set interaction parameters to represent thermodynamic and kinetic aspects of local intrachain and interchain interactions between monomers, which characterize polymer repeating-unit chemistry. We performed kinetic Monte Carlo simulations of Debye stress relaxation in stretched and parallel-aligned bulk amorphous polymers and evaluated the relative importance of each interactions in the diffusion energy derived from their Arrhenius fluid behaviors. The results demonstrated that, under the same strengths, the kinetic aspects of intrachain and interchain interactions raise much higher diffusion energies than their thermodynamic aspects. We discussed the example case of polyethylene. Our work paves the way towards the prediction of the structure-property relationship of the mechanical properties in bulk amorphous polymers.
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