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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.
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页码：1250 / 1254
页数：5
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