结合构型熵和自浓度来描述互溶聚合物共混物中的组分动力学。

Combining configurational entropy and self-concentration to describe the component dynamics in miscible polymer blends.

作者信息

Cangialosi D, Schwartz G A, Alegría A, Colmenero J

机构信息

Donostia International Physics Center, Paseo Manuel de Lardizabal 4, 20018 San Sebastián, Spain.

出版信息

J Chem Phys. 2005 Oct 8;123(14):144908. doi: 10.1063/1.2052592.

DOI:10.1063/1.2052592

PMID:16238425

Abstract

We provide a new approach to describe the component segmental dynamics of miscible polymer blends combining the concept of chain connectivity, expressed in terms of the self-concentration, and the Adam-Gibbs model. The results show an excellent agreement between the prediction of our approach and the experimental data. The self-concentrations obtained yield length scales between 1 and 3.2 nm depending on the temperature, the flexibility of the polymer, expressed in terms of the Kuhn segment, and its concentration in the blends, at temperatures above the glass transition range of the blend.

摘要

我们提供了一种新方法，结合以自浓度表示的链连接性概念和亚当 - 吉布斯模型，来描述可混溶聚合物共混物的组分链段动力学。结果表明，我们方法的预测与实验数据之间具有极好的一致性。在共混物玻璃化转变范围以上的温度下，所获得的自浓度产生的长度尺度在1至3.2纳米之间，这取决于温度、以库恩链段表示的聚合物柔韧性及其在共混物中的浓度。