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.
引用
收藏
页码:307 / 314
页数:8
相关论文
共 16 条
[11]   NEW THERMOTROPIC POLYMERS WITH FLEXIBLE BACKBONE AND MESOGENIC SIDE-CHAINS - SYNTHESIS AND CHARACTERIZATION [J].
ROBERT, P ;
VILLENAVE, JJ ;
FONTANILLE, M ;
GILLI, JM ;
SIXOU, P .
MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1988, 155 :161-170
[12]   POLYVINYL ETHER)S AND POLY(PROPENYL ETHER)S CONTAINING MESOGENIC GROUPS - A NEW CLASS OF SIDE-CHAIN LIQUID-CRYSTALLINE POLYMERS [J].
RODRIGUEZPARADA, JM ;
PERCEC, V .
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 1986, 24 (06) :1363-1378
[13]   EFFECTS OF MOLECULAR-WEIGHT DISTRIBUTION ON THE THERMAL-PROPERTIES OF SIDE-CHAIN LIQUID-CRYSTALLINE POLYVINYL ETHER)S [J].
SAGANE, T ;
LENZ, RW .
POLYMER JOURNAL, 1988, 20 (10) :923-931
[14]   MOLECULAR-WEIGHT EFFECTS ON THE LIQUID-CRYSTALLINE PROPERTIES OF POLYVINYL ETHER)S WITH PENDANT CYANOBIPHENYL MESOGENIC GROUPS [J].
SAGANE, T ;
LENZ, RW .
MACROMOLECULES, 1989, 22 (09) :3763-3767
[15]   LIVING CATIONIC POLYMERIZATION OF VINYL MONOMERS - MECHANISM AND SYNTHESIS OF NEW POLYMERS [J].
SAWAMOTO, M ;
HIGASHIMURA, T .
MAKROMOLEKULARE CHEMIE-MACROMOLECULAR SYMPOSIA, 1986, 3 :83-97
[16]   PREPARATION OF VINYL ETHERS BY TRANSETHERIFICATION IN PRESENCE OF MOLECULAR SIEVES [J].
YUKI, H ;
HATADA, K ;
NAGATA, K ;
KAJIYAMA, KI .
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1969, 42 (12) :3546-+