H-2 NMR-STUDY OF PHASE-TRANSITIONS AND ORIENTATIONAL ORDER IN A SIDE-CHAIN LIQUID-CRYSTAL POLYMER - EVIDENCE OF A NEMATIC-NEMATIC TRANSITION

被引：7

作者：

MUZZALUPO, R

RANIERI, GA

CATALANO, D

GALLI, G

VERACINI, CA

机构：

[1] UNIV PISA,DIPARTIMENTO CHIM & CHIM IND,I-56126 PISA,ITALY

[2] UNIV CALABRIA,DIPARTMENTO CHIM,I-87036 ARCAVACATA,ITALY

来源：

LIQUID CRYSTALS | 1995年 / 19卷 / 03期

关键词：

D O I：

10.1080/02678299508031993

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

We have investigated the mesomorphic behaviour of a partially deuteriated side chain LC polymethacrylate, poly[4-[6-methacryloyloxyhexyl-oxy]4'-methoxyazobenzene], by means of H-2 NMR, DSC and optical microscopy. Evidence for a phase transition occurring in the middle of the nematic phase has been found.

引用

收藏

页码：367 / 371

页数：5

相关论文

共 26 条

[1] DEUTERIUM QUADRUPOLAR PARAMETERS FROM H-1 AND H-2 NMR-SPECTRA FOR PYRIDINE-D5, BENZONITRILE-D5 AND CHLOROBENZENE-D5 USING LIQUID-CRYSTAL SOLVENTS [J].

AMBROSETTI, R ;

CATALANO, D ;

FORTE, C ;

VERACINI, CA .

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES, 1986, 41 (1-2) :431-435

[2]

ANDERLE K, 1989, MAKROMOL CHEM-RAPID, V10, P477

[3] A DEUTERIUM NMR-STUDY OF CHAIN ORDERING IN THE LIQUID-CRYSTALS 4,4'-DI-NORMAL-HEPTYLOXYAZOXYBENZENE AND 4-NORMAL-OCTYL-4'-CYANOBIPHENYL [J].

BODEN, N ;

CLARK, LD ;

BUSHBY, RJ ;

EMSLEY, JW ;

LUCKHURST, GR ;

STOCKLEY, CP .

MOLECULAR PHYSICS, 1981, 42 (03) :565-594

[4] A REFINEMENT OF CRYSTAL STRUCTURE OF AZOBENZENE [J].

BROWN, CJ .

ACTA CRYSTALLOGRAPHICA, 1966, 21 :146-&

[5] ORIENTATIONAL ORDER IN NEMATIC AND SMECTIC-A PHASES OF 3 CLOSELY RELATED-COMPOUNDS 4,4'-DI-NORMAL-HEPTYLAZOBENZENE, 4,4'-DI-NORMAL-HEPTYL-AZOXYBENZENE AND 4,4'-DI-NORMAL-OCTYLAZOXYBENZENE [J].

CATALANO, D ;

FORTE, C ;

VERACINI, CA ;

EMSLEY, JW ;

SHILSTONE, GN .

LIQUID CRYSTALS, 1987, 2 (03) :345-355

[6] SOLUTE SOLVENT INTERACTIONS IN THE NEMATIC AND SMECTIC-A PHASES OF 4,4'-DI-NORMAL-HEPTYLAZOXYBENZENE STUDIED BY DEUTERON NMR [J].

CATALANO, D ;

FORTE, C ;

VERACINI, CA ;

EMSLEY, JW ;

SHILSTONE, GN .

LIQUID CRYSTALS, 1987, 2 (03) :357-371

[7]

CATALANO D, 1985, GAZZ CHIM ITAL, V115, P233

[8] A THERMOTROPIC BIAXIAL NEMATIC LIQUID-CRYSTAL [J].

CHANDRASEKHAR, S ;

RATNA, BR ;

SADASHIVA, BK ;

RAJA, VN .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1988, 165 :123-130

[9]

CHIELLINI E, UNPUB

[10] LINEAR VISCOELASTICITY OF SIDE-CHAIN LIQUID-CRYSTAL POLYMERS [J].

COLBY, RH ;

GILLMOR, JR ;

GALLI, G ;

LAUS, M ;

OBER, CK ;

HALL, E .

LIQUID CRYSTALS, 1993, 13 (02) :233-245