Correlations between the effects of pressure and molecular weight on polymer blend miscibility

被引：22

作者：

Lipson, JEG ^{[1
]}

Tambasco, M

Willets, KA

Higgins, JS

机构：

[1] Dartmouth Coll, Burke Labs, Dept Chem, Hanover, NH 03755 USA

[2] Univ London Imperial Coll Sci Technol & Med, Dept Chem Engn & Chem Technol, London SW7 2BY, England

来源：

MACROMOLECULES | 2003年 / 36卷 / 08期

关键词：

D O I：

10.1021/ma0257301

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

We examine the effects of pressure on polymer blend miscibility for two polyolefin blends as well as for blends of polystyrene (PS) and polybutadiene (PB). Each of the blends studied exhibits an upper critical solution temperature (UCST), and for the PS/PB blend we report experimental results on the pressure dependence of the UCST for different molecular weight combinations. We make use of the Born-Green-Yvon integral equation theory to exploit the connection between the pressure dependence of the UCST and the sign of the volume change on mixing, leading us to predict that through judicious choice of polymer molecular weights the response of the UCST to pressure may be controlled.

引用

页码：2977 / 2984

页数：8

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