Polymer Glasses
Polymer Glasses
复制标题
聚合物玻璃
DOI：
10.1002/9783527815562.mme0064
复制
发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Connie B. Roth
中科院分区：
文献类型：
--
作者：
Connie B. Roth
聚合物以玻璃态存在，有广泛的应用。聚合物的缓慢和有限的结晶性意味着固体聚合物材料是完全或部分玻璃态的，这使它们非常重要。玻璃是一种非平衡非晶态，其发生是因为随着分子运动的可用热能降低，合作分子动力学在冷却时被动力学捕获。本章旨在为读者提供一幅分子图像，说明这种导致玻璃形成的堆积挫折对聚合物意味着什么。精确测量的玻璃化转变温度g给出这种非平衡性质的实验考虑将被讨论。基本概念支撑的理论努力，模拟玻璃化转变将被总结为读者提供一个词汇和范例，用于理解不同的方法在该领域中使用的捕捉玻璃的主要特征。简要介绍了目前聚合物玻璃的研究领域。希望这一章将提供一个开始调查员为自己的研究的起点。
Polymers exist in the glass state for a wide range of applications. The slow and limited crystallizability of polymers means that solid polymer materials are either wholly or in part glassy giving them great importance. The glass is a nonequilibrium amorphous state that occurs because the cooperative molecular dynamics become kinetically trapped on cooling as the available thermal energy for molecular motion decreases. This chapter aims to provide the reader with a molecular picture of what this packing frustration that causes glass formation means for polymers. Experimental considerations for accurately measuring the glass transition temperature g given this nonequilibrium nature will be discussed. Basic concepts underpinning theoretical efforts to model the glass transition will be summarized to provide the reader with a lexicon and paradigm for understanding different approaches used in the field to capture the main characteristics of glasses. Current research areas of interest in polymer glasses will be briefly outlined. Hopefully this chapter will provide the beginning investigator a starting point for their own studies.