NONCOOPERATIVE RELAXATIONS

被引：146

作者：

STARKWEATHER, HW

机构：

[1] DuPont, Wilmington, DE, USA, DuPont, Wilmington, DE, USA

来源：

MACROMOLECULES | 1988年 / 21卷 / 06期

关键词：

POLYMETHYL METHACRYLATE - Viscoelasticity - POLYSTYRENES - Viscoelasticity - RELAXATION PROCESSES;

D O I：

10.1021/ma00184a043

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Dynamic mechanical studies have revealed a large class of internal motions having activation entropies close to zero which appear to involve well-defined structural units acting in a noncooperative manner. Examples include rotations of methyl groups, certain side-group motions, and local-mode relaxations which are restricted to short polymethylene sequences. Other cases, including grain boundary relaxations in metals, are associated with crystalline phases.

引用

页码：1798 / 1802

页数：5

共 26 条

[1] FINE-STRUCTURE OF LOW-TEMPERATURE RELAXATION IN LINEAR POLYETHYLENE [J].