Semiflexible random thermotropic copolymers from 8-(3-hydroxy phenyl) octanoic acid and 3-chloro-4-hydroxy benzoic acid/3,5-dibromo-4-hydroxy benzoic acid

Mitra S; Pillai CKS

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Semiflexible random thermotropic copolymers from 8-(3-hydroxy phenyl) octanoic acid and 3-chloro-4-hydroxy benzoic acid/3,5-dibromo-4-hydroxy benzoic acid

机译：8-（3-羟基苯基）辛酸和3-氯-4-羟基苯甲酸/ 3,5-二溴-4-羟基苯甲酸的半柔性无规热致共聚物

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Two series of semiflexible random thermotropic copolymers containing 8-(3-hydroxy phenyl) octanoic acid (HPOA) with either 3-chloro-4-hydroxy benzoic acid or 3,5-dibromo-4-hydroxy benzoic acid were prepared by melt polycondensation techniques. The copolyesters were characterized with Fourier transform infrared spectroscopy, dilute solution viscometry, hot-stage polarized light microscopy, differential scanning calorimetry, thermogravimetric analysis, and wide-angle X-ray diffraction. Studies revealed that the amount of HPOA as a disruptor incorporated into the backbone of substituted 4-hydroxy benzoic acids had a detrimental effect on the liquid-crystalline behavior. Mesophase-transition temperatures were observed between 210 and 250 degrees C, and the optical textures were of typical nematic phases. The degree of crystallinity decreased with an increase in the HPOA content. The thermal stability of the copolymers was in the range of 310-370 degrees C. (C) 2007 Wiley Periodicals, Inc.

机译：通过熔融缩聚技术制备了包含8-（3-羟基苯基）辛酸（HPOA）与3-氯-4-羟基苯甲酸或3,5-二溴-4-羟基苯甲酸的两系列半柔性无规热致共聚物。。通过傅里叶变换红外光谱，稀溶液粘度测定，热阶段偏振光显微镜，差示扫描量热法，热重分析和广角X射线衍射对共聚酯进行表征。研究表明，掺入取代的4-羟基苯甲酸主链中的作为破坏剂的HPOA的含量对液晶行为有不利影响。在210至250摄氏度之间观察到中间相转变温度，并且光学织构具有典型的向列相。结晶度随着HPOA含量的增加而降低。共聚物的热稳定性在310-370摄氏度的范围内。（C）2007 Wiley Periodicals，Inc.

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《Journal of Applied Polymer Science》 |2008年第2期|共6页
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Mitra S; Pillai CKS;
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halogenated; liquid-crystalline polymers (LCP); polyesters; synthesis; thermal properties; LIQUID-CRYSTALLINE POLYESTERS; HYDROXYPHENYLALKANOIC ACIDS; AROMATIC POLYESTERS; COPOLYESTERS; POLYMERS;

机译：卤化;液晶聚合物（LCP）;聚酯;合成;热性能;液晶聚合物;羟基苯烷基酸;芳族聚酯;共聚聚酯;聚合物;

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1. Semiflexible random thermotropic copolymers from 8-(3-hydroxy phenyl) octanoic acid and 3-chloro-4-hydroxy benzoic acid/3,5-dibromo-4-hydroxy benzoic acid [J] . Mitra S, Pillai CKS Journal of Applied Polymer Science . 2008,第2期

机译：8-（3-羟基苯基）辛酸和3-氯-4-羟基苯甲酸/ 3,5-二溴-4-羟基苯甲酸的半柔性无规热致共聚物
2. CRYSTALLINE AND LIQUID CRYSTALLINE POLYESTERS OF PHENYL-SUBSTITUTED 4,4'-BIPHENOLS .5. COPOLYMERS WITH 4,4'-OXYBIS(BENZOIC ACID) [J] . Bhowmik PK., Lenz RW., Han H., Macromolecules . 1996,第11期

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3. Photoinduced Reorientation and Surface Relief Formation in Diblock and Random Copolymers with Benzoic Acid and Alkyloxy Side Groups [J] . Ikoma Hiromi, Kondo Mizuho, Kawatsuki Nobuhiro Macromolecules . 2018,第14期

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4. The combating of corrosion with the help of alkyl benzoic acids salts. Note I. The testing of the sodium salts of p-isopropyl benzoic acid as corrosion inhibitor [C] . P. Chipurici, L. Papahagi, R. Avram, 12th Romanian International Conference on Chemistry and Chemical Engineering Sep 13-15, 2001 Bucharest, Romania . 2001

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机译：苯甲酸（C14羧基）水溶液的辐解制备间 - 和对 - 羟基苯甲酸（C14羧基）

Semiflexible random thermotropic copolymers from 8-(3-hydroxy phenyl) octanoic acid and 3-chloro-4-hydroxy benzoic acid/3,5-dibromo-4-hydroxy benzoic acid

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