SEMIINTERPENETRATING POLYMER NETWORKS WITH CONTROLLABLE MORPHOLOGY - ARREST OF DEMIXING BY THERMOREVERSIBLE GELATION

被引：3

作者：

DEGRAAF, LA ^{[1
]}

MOLLER, M ^{[1
]}

机构：

[1] UNIV TWENTE,DEPT CHEM TECHNOL,POB 217,7500 AE ENSCHEDE,NETHERLANDS

来源：

MACROMOLECULAR SYMPOSIA | 1994年 / 77卷

关键词：

D O I：

10.1002/masy.19940770118

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Semi-interpenetrating polymer networks with well defined morphologies were obtained using a three-step process, separating morphology formation and polymerization/crosslinking. Different phase textures were formed when (spinodal) liquid/liquid demixing of a solution of atactic polystyrene in methacrylate monomers was arrested by thermoreversible gelation (vitrification) of the polymer-rich phase at a desired stage. Subsequent UV-polymerization of the methacrylate allowed to study the morphology by transmission electron microscopy. Phase diagrams of polymer solutions with low and high viscosities are reported. Depending on the initial solution viscosities and the applied cooling conditions, morphologies both with a dispersed as well with a continuous polystyrene phase could be obtained at PS concentrations already below 10 Mechanical measurements indicated only partial demixing in the semi-IPN's.

引用

页码：149 / 156

页数：8

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