Thermal Properties and FT-IR Investigation of Side Chain Type Liquid Crystalline Copolymers

被引：1

作者：

Mihara, Takashi ^{[1
]}

Mori, Kazunari ^{[1
]}

Koide, Naoyuki ^{[1
]}

机构：

[1] Tokyo Univ Sci, Fac Sci, Dept Chem, Shinjuku Ku, Tokyo 162, Japan

来源：

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS | 1998年 / 318卷

关键词：

side chain type liquid crystalline copolymer; hydrogen bonding; thermally controlled FT-IR; carboxylic acid dimer;

D O I：

10.1080/10587259808045391

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

In order to investigate the effect of hydrogen bonding formed between carboxylic acid groups on thermal properties of the side chain type liquid crystalline polymers, we synthesized the side chain type copolymers composed of a mesogenic monomer and a non-mesogenic monomer with carboxylic acid group. Hydrogen bonding was examined by thermally controlled FT-IR measurements. A mesophase was exhibited for the copolymers containing the mesogenic monomer above 40 similar to 65 mol%. The mesomorphic temperature range(MR) of the copolymers increased in the order of the copolymer with methacrylic acid monomer, with benzoic acid monomer containing a flexible spacer and with benzoic acid monomer. This difference in the MR of the copolymers was demonstrated by FT-IR quantitative analysis of the area of the peak assigned to the dimer structure of the carboxylic acid group.

引用

页码：291 / 305

页数：15

共 9 条

[1] Induction of the smectic phase in comb-shaped liquid crystalline ionogenic copolymers by hydrogen bond formation [J].

Barmatov, EB ;

Pebalk, DA ;

Barmatova, MV ;

Shibaev, VP .

LIQUID CRYSTALS, 1997, 23 (03) :447-451

[2]

FINKELMANN H, 1978, MAKROMOL CHEM, V179, P2541

[3]

FINKELMANN H, 1978, MAKROMOL CHEM, V179, P273

[4] Thermoinduced rearrangement of the hydrogen bonded systems in liquid crystalline carboxylic acids [J].

Krasnogholovets, VV ;

Puchkovskaya, GA ;

Yakubov, AA .

MOLECULAR CRYSTALS AND LIQUID CRYSTALS SCIENCE AND TECHNOLOGY SECTION A-MOLECULAR CRYSTALS AND LIQUID CRYSTALS, 1995, 265 :143-150

[5] The influence of hydrogen bonding on the mesomorphic properties of side chain type liquid crystalline polyurethanes with rigid moieties in the polymer backbone [J].

Mihara, T ;

Koide, N .

POLYMER JOURNAL, 1997, 29 (02) :138-141

[6] Hydrogen bonding and mesomorphic properties for side chain type liquid crystalline polyurethanes containing rigid moieties in the polymer backbone [J].

Mihara, T ;

Koide, N .

POLYMER JOURNAL, 1997, 29 (02) :134-137

[7] INFRARED SPECTROSCOPIC APPROACHES TO POLYMER TRANSITIONS .2. TRANSITION OF HYDROGEN-BONDING IN STYRENE-METHACRYLIC ACID (ST-MAA) COPOLYMERS [J].

OGURA, K ;

SOBUE, H .

POLYMER JOURNAL, 1972, 3 (02) :153-&

[8] THERMOTROPIC LIQUID-CRYSTALS FORMED BY INTERMOLECULAR HYDROGEN INTERACTIONS [J].

PALEOS, CM ;

TSIOURVAS, D .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION IN ENGLISH, 1995, 34 (16) :1696-1711

[9] Hydrogen bonding in liquid crystalline phases of p-n-alkoxybenzoic acids [J].

Plass, M .

ZEITSCHRIFT FUR PHYSIKALISCHE CHEMIE-INTERNATIONAL JOURNAL OF RESEARCH IN PHYSICAL CHEMISTRY & CHEMICAL PHYSICS, 1996, 194 :223-230

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