MORPHOLOGIES OF POLY(DIMETHYLSILOXANE)-NYLON-6 DIBLOCK COPOLYMERS AND BLENDS

被引：30
|
作者：
VEITH, CA
COHEN, RE
ARGON, AS
机构：
[1] MIT,DEPT CHEM ENGN,CAMBRIDGE,MA 02139
[2] MIT,DEPT MECH ENGN,CAMBRIDGE,MA 02139
来源：
POLYMER | 1991年 / 32卷 / 09期
基金：
美国国家科学基金会;
关键词：
POLY(DIMETHYLSILOXANE)-NYLON-6 DIBLOCK COPOLYMERS; MORPHOLOGY; TEM;
D O I：
10.1016/0032-3861(91)90387-X
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The morphologies of poly(dimethylsiloxane)-nylon-6 diblock copolymers and binary/ternary blends with PDMS and nylon-6 homopolymers have been revealed by transmission electron microscopy (TEM). The spherulitic morphologies of materials cast from solution in 2,2,2 trifluoroethanol have been compared to the spherical microphase-separated structures obtained by annealing above the melting point of nylon-6. Either the PDMS rubber block length or the nature of the casting solvent can be employed to shift control of the morphology between mechanisms of microphase separation and crystallization. As a result, 'path-dependent' morphologies have been observed for PDMS-nylon-6 diblock copolymers and blends and these are explained in a unified manner via a conceptual phase diagram.
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页码：1545 / 1554
页数：10
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