標題: | SYNTHESIS AND CHARACTERIZATION OF SIDE-CHAIN LIQUID-CRYSTALLINE POLYSILOXANES CONTAINING 4-ALKANYLOXYPHENYL TRANS-4-ALKYLCYCLOHEXANOATE SIDE GROUPS |
作者: | HSU, CS LU, YH 交大名義發表 應用化學系 National Chiao Tung University Department of Applied Chemistry |
公開日期: | 1-六月-1991 |
摘要: | The synthesis and characterization of nine polysiloxanes containing 4-alkanyloxyphenyl trans-4-n-alkylcyclohexane side groups are described. Six monomers which contain a pentenyloxy or a hexenyloxy flexible spacer display a nematic mesophase, while the other three monomers which contain an undecenyloxy flexible spacer display nematic, smectic A and smectic E mesophases. All synthesized polymers present two smectic mesophases except one containing 4-hexanyloxyphenyl trans-4-n-butylcyclohexanoate side groups presents one smectic mesophase and one containing 4-undecanyloxyphenyl trans-4-n-pentylcyclohexanoate side groups presents three smectic mesophases. Trans-cis isomerization of mesogens and side chain crystallization did not occur for any of the synthesized polymers. |
URI: | http://dx.doi.org/10.1002/pola.1991.080290704 http://hdl.handle.net/11536/3779 |
ISSN: | 0887-624X |
DOI: | 10.1002/pola.1991.080290704 |
期刊: | JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY |
Volume: | 29 |
Issue: | 7 |
起始頁: | 977 |
結束頁: | 986 |
顯示於類別: | 期刊論文 |