Glass transition temperature near the solid surface of poly(methyl methacrylate)

被引：2

作者：

Yamamoto, K ^{[1
]}

Shimada, S ^{[1
]}

Tsujita, Y ^{[1
]}

Sakaguchi, M ^{[1
]}

机构：

[1] ICHIMURA GAKUEN COLL,INUYAMA,AICHI 484,JAPAN

来源：

KOBUNSHI RONBUNSHU | 1996年 / 53卷 / 12期

关键词：

glass transition; solid surface; spin-labeling; molecular motion; poly(methyl methacrylate); segmental density; tacticity;

D O I：

10.1295/koron.53.823

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Poly(methyl methacrylate)s, (PMMA)s, were spin-labeled in methanol to study the surface molecular mobility. Transition temperature in molecular motion, T-50mT obtained by ESR was found to be lower than that in the bulk. Glass transition temperature near the solid surface can be estimated using the ESR data and WLF equation. The glass transition temperature near the solid surface of PMMA was estimated to be approximately 30 similar to 40 K lower than that in the bulk. This fact indicates that the segmental density near the solid surface is lower than that of the bulk polymer. In addition, it was found that the molecular mobility near the solid surface depends on the tacticity of PMMA.

引用

页码：823 / 828

页数：6

共 17 条

[1] THE AMINOLYSIS OF ESTERS - A PRELIMINARY STUDY [J].