在聚甲基甲酸中描述异热老化变过程,使用分数差异模型
1Key Laboratory of Green Building and Intelligent Construction in Higher Educational Institutions of Hunan Province, Hunan City University, Yiyang 413000, China.
Polymers
|October 16, 2024
概括
身体衰老会增加聚甲基甲酸的弹性和放松时间. 分数微分模型有效地捕捉了这些变化,揭示了时间衰老的时间等价原理.
科学领域:
- 材料科学 材料科学 材料科学
- 聚合物物理 聚合物物理
- 类风病学 类风病学 类风病学
背景情况:
- 分数微分粘弹性模型提供了对复杂物质行为有力的描述.
- 在这些模型中解释参数的物理意义仍然是一个挑战.
- 了解物理衰老对聚合物粘性弹性的影响,对于材料设计至关重要.
研究的目的:
- 应用微分差模型来分析聚甲基甲酸在不同老化时间下的短期爬行合规性.
- 调查模型参数与材料老化有关的物理意义.
- 为了证明聚合物爬行中的时间老化时间等价原理.
主要方法:
- 通过使用微分差的麦克斯韦尔,凯尔文和泽纳模型,将聚甲基甲酸的实验爬行合规数据合适.
- 分析模型参数的变化 (模块,粘度,分数顺序,放松时间) 随着老化时间的增加.
- 在不同的衰老时间叠加爬行曲线,使用放松时间作为缩放因子.
主要成果:
- 分数差异模型与实验爬行合规数据提供了良好的一致性.
- 加长的老化时间导致了更弹性的材料反应 (弹模量增加,弹粘度降低).
- 身体衰老增加了放松时间,减少了自由体积,并减少了分数顺序,表明减少了爬行服从.
结论:
- 身体老化增强了弹性,并增加了聚甲基甲酸的放松时间.
- 分数差异模型成功阐明了老化对聚合物粘性弹性的影响.
- 这项研究证实了聚甲基甲酸甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基甲基
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