Ferrocene-containing thermotropic side-chain liquid-crystalline polysiloxanes

被引:37
作者
Deschenaux, R
Jauslin, I
Scholten, U
Turpin, F
Guillon, D
Heinrich, B
机构
[1] Univ Neuchatel, Inst Chim, CH-2000 Neuchatel, Switzerland
[2] Inst Phys & Chim Mat Strasbourg, Grp Mat Organ, F-67037 Strasbourg, France
关键词
D O I
10.1021/ma980410w
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 synthesis, purification, characterization, and Liquid-crystalline properties of side-chain polysiloxanes bearing mesomorphic 1,1'- or 1,3-disubstituted ferrocene units are reported. The polymers were prepared by grafting the appropriate vinyl-containing ferrocene monomer onto commercially available poly(hydrosiloxane)s following a standard procedure. The monomers gave smectic A or smectic A and smectic C phases depending on the length of the flexible chains connected to the ferrocene unit. X-ray diffraction indicated that the polysiloxanes exhibited disordered smectic phases. Variation of the d-layer spacing determined for the polymers containing either 100% or 15-18% of the 1,1'-disubstituted ferrocene monomer (with the longest terminal alkyl chain) revealed the presence of smectic A and smectic C phases. Thermogravimetry showed a good thermal stability for the polymers.
引用
收藏
页码:5647 / 5654
页数:8
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