Segmented liquid-crystalline polyesters with allyl groups as lateral substituents. Synthesis and characterization

被引：14
作者：
Acierno, D
Fresa, R
Iannelli, P
Vacca, P
机构：
[1] Univ Salerno, Dipartimento Ingn Chim Alimentare, I-84084 Fisciano, Salerno, Italy
[2] Univ Naples, Dipartimento Ing Mat Prod, I-80125 Naples, Italy
来源：
POLYMER | 2000年 / 41卷 / 11期
关键词：
liquid-crystalline polymers; network; X-ray diffraction;
D O I：
10.1016/S0032-3861(99)00634-5
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The synthesis and the characterization of segmented liquid-crystalline [P(n)] made by interfacial polycondensation of 3-allyl-4,4'-dihydroxybiphenyl and the acid chlorides of alpha,omega-dicarboxy-alkanes are reported. The flexible spacers contain even numbers of methylene units (n = 6-14), All polymers are enantiotropic showing a nematic phase with isotropization temperature in the range of about 95-175 degrees C. At room temperature all polymers show a mesophasic structure except for P(8) which is crystalline. Both P(12) and P(14) show a quasihexagonal phase with six chains per unit cell. (C) 2000 Elsevier Science Ltd. All rights reserved.
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页码：4179 / 4187
页数：9
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