INFLUENCE OF STAR-CORE EXCLUSION ON POLYMER POLYMER MISCIBILITY

被引：26

作者：

FAUST, AB

STREMCICH, PS

GILMER, JW

MAYS, JW

机构：

[1] PENN STATE UNIV,UNIVERSITY PK,PA 16802

[2] UNIV ALABAMA,DEPT CHEM,BIRMINGHAM,AL 35294

来源：

MACROMOLECULES | 1989年 / 22卷 / 03期

关键词：

Light--Scattering; -; Molecules; Polymers--Blending; Thermodynamics;

D O I：

10.1021/ma00193a041

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

In this study the effect was investigated of the high functionality branch point in the star-shaped polystyrene (PS) molecule on the shape of its phase diagram when mixed with poly(vinyl methyl ether) (PVME). A comparison was made between samples containing a 22-arm star-shaped PS blended with linear PVME and the linear/linear blend comprised of components of the same molecular weight. These materials were characterized by wide-angle light-scattering cloud-point analyses utilizing both ramp and stepwise heating to properly separate thermodynamic and kinetic effects. Although the temperature minima for the cloud-point curves of both the star/linear blend and the linear/linear blend are the same, the curve for the star/linear system is shifted to the polystyrene-rich side of the composition axis.

引用

页码：1250 / 1254

页数：5

共 23 条

[1] THERMALLY INDUCED PHASE SEPARATION OF POLYSTYRENE-POLY(VINYL METHYL-ETHER) MIXTURES [J].