The review deals with issues related to the theoretical analysis of the main relationship between the chemical structure of polymer and the response of various structural elements of this system to external mechanical effects at different temperatures and frequencies. The analysis is performed using the spectra of internal friction of unplasticized and plasticized polymethylmethacrylate (PMMA) obtained by dynamic methods of external deforming effects in the frequency range from 10^–2 to 10³ Hz and a temperature range of–50 to +250°C. The regions of local inelasticity are found, and the mechanisms of dissipative losses manifested in different temperature ranges of the spectrum are determined. The physical and chemical characteristics are calculated for each of the identified relaxation processes, and the dependence of these characteristics on molecular weight is found.

中文翻译：

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聚甲基丙烯酸甲酯局部耗散损耗的理化特性

这篇综述涉及与聚合物化学结构之间的主要关系以及该系统的各种结构元素对不同温度和频率下的外部机械效应的响应之间的理论分析有关的问题。使用通过动态变形方法在10 ^–2到10 ³频率范围内获得的未塑化和塑化的聚甲基丙烯酸甲酯（PMMA）的内摩擦光谱进行分析。Hz和–50至+ 250°C的温度范围。找到局部非弹性区域，并确定在光谱的不同温度范围内表现出的耗散损耗的机理。针对每个确定的弛豫过程计算物理和化学特性，并发现这些特性对分子量的依赖性。