THE SYNTHESIS AND CHARACTERIZATION OF A MESOMORPHIC BRUSH TYPE POLYCARBOSILANE - POLY[1,1-BIS(4'-BIPHENYL)SILABUTANE]

被引：4
|
作者：
SARGEANT, SJ [1 ]
BEAN, L [1 ]
TAPSAK, MA [1 ]
WEBER, WP [1 ]
机构：
[1] UNIV SO CALIF,DP & KB LOKER HYDROCARBON RES INST,DEPT CHEM,LOS ANGELES,CA 90089
来源：
POLYMER BULLETIN | 1993年 / 31卷 / 03期
关键词：
D O I：
10.1007/BF00692952
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Poly[1,1-bis(4'-biphenyl)silabutane] (II) has been prepared by the anionic ring opening polymerization of 1,1-bis(4'-biphenyl)silacyclobutane. II shows mesomorphic behavior by DSC. The C-13 NMR T1 relaxation times have been measured. These are found to be smaller than those of poly(1,1-dimethylsilabutane) by an order of magnitude. This may result from interaction of the highly rigid biphenyl side chain moieties. The thermal stability of II is higher than that for other 1,1-disubstituted polysilabutanes. [GRAPHICS].
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页码：279 / 283
页数：5
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