PROPERTIES OF NETWORKS FORMED BY END LINKING OF POLY(DIMETHYLSILOXANE)

被引：137

作者：

VALLES, EM ^{[1
]}

MACOSKO, CW ^{[1
]}

机构：

[1] UNIV MINNESOTA,DEPT CHEM ENGN & MAT SCI,MINNEAPOLIS,MN 55455

来源：

MACROMOLECULES | 1979年 / 12卷 / 04期

关键词：

D O I：

10.1021/ma60070a025

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Networks with well-defined structures were prepared by end linking vinyl-terminated poly(dimethylsiloxane) chains with tri- and tetrafunctional silanes. Modulus and extent of reaction were followed continuously on several systems. If trapped entanglements are accounted for, the modulus rise can be modeled quantitatively with branching theory. The effect of entanglements is demonstrated by changing molecular weight of the chains and by dilution. Comparison of data between tri- and tetrafunctional cross-linkers indicates clearly the importance of junction mobility. The C2Mooney-Rivlin constant is small. Sol fraction and swelling data are also in reasonable agreement with predictions from branching theory. © 1979, American Chemical Society. All rights reserved.

引用

页码：673 / 679

页数：7

共 32 条

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