MODIFICATION OF POLYSTYRENE POLYBUTADIENE BLOCK COPOLYMER FILMS BY CHEMICAL-REACTION WITH BROMINE AND EFFECT ON GAS-PERMEABILITY

被引：9

作者：

CSERNICA, J ^{[1
]}

REIN, DH ^{[1
]}

BADDOUR, RF ^{[1
]}

COHEN, RE ^{[1
]}

机构：

[1] MIT,DEPT CHEM ENGN,CAMBRIDGE,MA 02139

来源：

MACROMOLECULES | 1991年 / 24卷 / 12期

关键词：

D O I：

10.1021/ma00012a023

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Permeability coefficients (P) for several gases were measured in heterogeneous polystyrene/polybutadiene (PS/PB) block copolymer films before and after reaction with aqueous bromine. Reacted films exhibited increased selectivity compared to the starting material. While films reacted to low and very high extents were less permeable than unmodified films, those reacted to intermediate extents displayed higher effective permeability coefficients than the original block copolymer, resulting in membranes that exhibited both selectivity and permeability enhancement relative to the starting PS/PB system. These effects are the combined result of physical and chemical changes caused by the bromination reaction.

引用

页码：3612 / 3617

页数：6

共 21 条

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[3]

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