SYNTHESIS AND PROPERTIES OF POLY[BIS(GAMMA-ETHOXYPROPYL)SILYLENE]

被引：22
|
作者：
FREY, H
OUT, GJJ
MOLLER, M
GRESZTA, D
MATYJASZEWSKI, K
机构：
[1] UNIV TWENTE,POSTBUS 217,7500 AE ENSCHEDE,NETHERLANDS
[2] INST CHARLES SADRON,F-67000 STRASBOURG,FRANCE
来源：
MACROMOLECULES | 1993年 / 26卷 / 23期
关键词：
D O I：
10.1021/ma00075a017
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Bis(gamma-ethoxypropyl)dichlorosilane was synthesized by hydrosilylation of dichlorosilane. Polymerization yielded monomodal high molecular weight poly[bis(gamma-ethoxypropyl)silylene] (PDEPS). PDEPS is soluble in alcohols with longer alkyl groups and acetone. Bulk PDEPS exhibits a blue shift of lambda(max) from 362 to 315 nm correlated with the mesomorphic transition occurring at 25-degrees-C. Above 25-degrees-C, PDEPS transforms into a highly mobile columnarlike mesophase. Transition enthalpy, wavelength of the absorption maximum, and Si-29 MAS CP solid-state NMR indicate that PDEPS crystallizes in a disturbed all-trans-like structure. In addition to PDEPS, some copolymers with di-n-hexyl-substituted units were studied.
引用
收藏
页码：6231 / 6236
页数：6
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