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.

引用

页码：1545 / 1554

页数：10

共 41 条

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