基于LWLRA的聚合物弛豫时间与加载频率相关性研究

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, COMPOSITES

Plastics, Rubber and Composites Pub Date : 2021-07-01 DOI:10.1080/14658011.2021.1947682

Yizhan Yang, Jinwei Yao, Jian-kang Chen

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引用次数: 0

摘要

在经典粘弹性理论中，当加载频率不变时，加载与粘弹性固体响应的相位差不变。然而，在我们的实验中发现，随着应力循环次数的增加，相位差逐渐减小。采用局部加权线性回归算法(LWLRA)对实验数据进行了分析，得到了加载与响应之间的相位差值。初始相位差与加载频率服从幂律关系。基于Maxwell粘弹性模型，提出了加载频率与松弛时间的关系，该关系可以用幂函数来描述。

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Correlation between polymer relaxation time and loading frequency based on LWLRA

ABSTRACT In classical viscoelastic theory, phase difference between loading and viscoelastic solid response does not change if loading frequency remains constant. In our experiments, however, it was found that phase difference was gradually decreased as the number of stress cycles was increased. Using local weighted linear regression algorithm (LWLRA), experimental data were successfully analysed and phase difference values between loading and response were obtained. The relation between initial phase difference and loading frequency obeys power-law. Based on Maxwell viscoelastic model, the relationship between relaxation time and loading frequency was proposed, which could be described by a power function.

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来源期刊

Plastics, Rubber and Composites 工程技术-材料科学：复合

CiteScore

4.10

自引率

0.00%

发文量

审稿时长

4 months

期刊介绍： Plastics, Rubber and Composites: Macromolecular Engineering provides an international forum for the publication of original, peer-reviewed research on the macromolecular engineering of polymeric and related materials and polymer matrix composites. Modern polymer processing is increasingly focused on macromolecular engineering: the manipulation of structure at the molecular scale to control properties and fitness for purpose of the final component. Intimately linked to this are the objectives of predicting properties in the context of an optimised design and of establishing robust processing routes and process control systems allowing the desired properties to be achieved reliably.