SYNTHESIS AND CHARACTERIZATION OF POLY(VINYLETHER)S WITH PENDANT MESOGENIC GROUPS

被引:26
作者
HEROGUEZ, V
SCHAPPACHER, M
PAPON, E
DEFFIEUX, A
机构
[1] UNIV BORDEAUX 1,INST PIN,CHIM POLYMERES ORGAN LAB,CNRS UNITE,351 COURS LIBERAT,F-33405 TALENCE,FRANCE
[2] UNIV BORDEAUX 1,INST PIN,ECOLE NATL SUPER CHIM & PHYS BORDEAUX,F-33405 TALENCE,FRANCE
关键词
D O I
10.1007/BF00316899
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
Two different methods of synthesis were examined for the preparation of poly(alkylvinylether)s with pendant 4'-cyano-4-oxy-biphenyl mesogenic groups attached to side chains of different length: a) anchoring of the mesogenic group onto an alkylvinylether monomer followed by polymerization or b) synthesis of the corresponding poly(chloroalkylvinylether)s and chemical substitution of the pendant chlorine by the mesogenic groups. Polymerization were performed with initiating systems based on activated iodide. Much better control of MW and MWD of the final polyvinylether chains was obtained when process b) was applied. Polymers with 2 and 4 carbons in the spacer do not show liquid crystalline properties. It is only with polymers having six carbon atoms in the spacer that mesophases were observed. Those issued from process b) give two distinct mesophases: a smectic A phase in the high temperature range and a smectic C phase for the low one. Polymers synthetized from process a) present only the smectic A phase. The effects of molecular weights and molecular weight distributions on the liquid crystalline properties have been examined and are discussed.
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页码:307 / 314
页数:8
相关论文
共 16 条
[1]   LIVING CATIONIC POLYMERIZATION OF VINYL ETHERS WITH A FUNCTIONAL-GROUP .1. POLYMERIZATION OF 2-ACETOXYETHYL VINYL ETHER AND SYNTHESIS OF POLYALCOHOLS WITH A NARROW MOLECULAR-WEIGHT DISTRIBUTION [J].
AOSHIMA, S ;
NAKAMURA, T ;
UESUGI, N ;
SAWAMOTO, M ;
HIGASHIMURA, T .
MACROMOLECULES, 1985, 18 (11) :2097-2101
[2]  
BRAUN D, 1987, MAKROMOL CHEM-RAPID, V8, P359
[3]  
HIGASHIMURA T, 1984, ADV POLYM SCI, V62, P49
[4]  
IZAWA T, 1985, J POLYM SCI POL CHEM, V23, P1893
[5]   THERMOTROPIC HYDROCARBON SIDE-CHAIN LIQUID-CRYSTALLINE POLYMERS .2. POLYMER SYNTHESIS AND TACTICITY [J].
MALLON, JJ ;
KANTOR, SW .
MACROMOLECULES, 1989, 22 (05) :2077-2082
[6]   C-13 NUCLEAR MAGNETIC-RESONANCE STUDIES ON STEREOCHEMICAL CONFIGURATIONS OF 2,4-DIMETHOXYPENTANE AND POLY(ALKYL VINYL ETHERS) [J].
MATSUZAKI, K ;
ITO, H ;
KAWAMURA, T ;
URYU, T .
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 1973, 11 (05) :971-987
[7]  
NUYKEN O, 1988, POLYM PREP-ACS, V29, P2
[8]   SYNTHESIS AND CHARACTERIZATION OF LIQUID-CRYSTALLINE POLY(P-VINYLBENZYL ETHER)S [J].
PERCEC, V ;
RODRIGUEZPARADA, JM ;
ERICSSON, C .
POLYMER BULLETIN, 1987, 17 (04) :347-352
[9]  
PERCEC V, 1987, POLYM BULL, V18, P239
[10]   FUNCTIONAL POLYMERS AND SEQUENTIAL COPOLYMERS BY PHASE-TRANSFER CATALYSIS .30A. SYNTHESIS OF LIQUID-CRYSTALLINE POLY(EPICHLOROHYDRIN) AND COPOLYMERS [J].
PUGH, C ;
PERCEC, V .
POLYMER BULLETIN, 1986, 16 (06) :521-528