USING SOLUBILITY DIFFERENCE TO ACHIEVE SURFACE PHASE-SEPARATION IN DIMETHYLSILOXANE-UREA-URETHANE COPOLYMERS

被引：17

作者：

GARDELLA, JA

HO, T

WYNNE, KJ

ZHUANG, HZ

机构：

[1] USN,RES LAB,MAT CHEM BRANCH,WASHINGTON,DC 20375

[2] GEORGE MASON UNIV,DEPT CHEM,FAIRFAX,VA 22030

[3] OFF NAVAL RES,DIV PHYS SCI S&T,ARLINGTON,VA 22217

[4] SUNY BUFFALO,DEPT CHEM,BUFFALO,NY 14260

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 1995年 / 176卷 / 01期

关键词：

SURFACE PHASE SEPARATION; PDMS-PU COPOLYMER; SOLVENT EFFECT; SELECTIVE PRECIPITATION;

D O I：

10.1006/jcis.1995.0033

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Effects of the casting solvent on the surface compositions of a series of polydimethylsiloxane (PDMS)-urethane-urea copolymers were investigated. The solvent pair investigated was tetrahydrofuran (THF) and mineral spirits (MS). Factors that determine solubility of a copolymer in a mixture of THF and MS include the solvent composition and the ratio between the sizes of the soft and the hard segments. The effectiveness of using mixed solvent to enhance surface PDMS enrichment varies with the copolymer composition. The benefits are maximized when the average molecular weight of the PDMS segments is 10,000. (C) 1995 Academic Press, Inc.

引用

页码：277 / 279

页数：3

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