| PABA-ABPA-TPA热致性液晶共聚酯的合成及表征 |
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| 引用本文： | 王久芬,张娜,李成杰. PABA-ABPA-TPA热致性液晶共聚酯的合成及表征[J]. 高分子材料科学与工程, 2005, 21(1): 129-132 |
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| 作者姓名： | 王久芬 张娜 李成杰 |
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| 作者单位： | 华北工学院化学工程系,山西,太原,030051;华北工学院化学工程系,山西,太原,030051;华北工学院化学工程系,山西,太原,030051 |
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| 基金项目： | 山西省自然科学基金项目(20011017) |
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| 摘 要： | 以对-乙硫氧基幕甲酸(PABA)，4，4‘-二乙酰氧基二苯基丙烷(ABPA)和对苯二甲酸(TPA)为原料，采用熔融缩聚法合成了热致性液晶共聚酯PABA—ABPA—TPA．测定了样品的粘度，求得其相对分子质量．并用DSC、偏光显微镜、X射线衍射、红外光谱，核磁共振等手段对其进行了表征。证明该共聚酯为向列型液晶，在一定的温度范围内有很好的液晶性。在单体的精制和共聚酯的制备方面探索了新的方法．
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| 关 键 词： | 热致性液晶共聚酯 对-乙酰氧基苯甲酸 4 4′-二乙酰氧基二苯基丙烷 熔融缩聚 向列型液晶 |
| 文章编号： | 1000-7555(2005)01-0129-04 |
| 修稿时间： | 2003-04-14 |
SYNTHESIS AND CHARACTERIZATION OF PABA/ABPA/TPA THERMOTROPIC LIQUID CRYSTALLINE COPOLYESTER |
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| WANG Jiu-fen,ZHANG Na,LI Cheng-jie. SYNTHESIS AND CHARACTERIZATION OF PABA/ABPA/TPA THERMOTROPIC LIQUID CRYSTALLINE COPOLYESTER[J]. Polymer Materials Science & Engineering, 2005, 21(1): 129-132 |
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| Authors: | WANG Jiu-fen ZHANG Na LI Cheng-jie |
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| Abstract: | A series samples of thermotropic liquid crystalline copolyesters of p-acetoxybenzoic acid (PABA), acetoxybiphenol A and therephalic acid were synthesized by melting polycondensation .The TLCPs were characterized by viscosity, DSC, polarized microscope, X-ray diffraction, IR and NMR. The experimental results show that the copolyester exhibits nematic liquid crystallinity. In a certain scope of temperature, the copolyester shows good liquid crystallinility. The experiment explored new way at the side of purification of monomer and polymerization of copolyester. |
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| Keywords: | thermotropic liquid crystalline copolyester p-acetoxybenzoic acid biphenol A melting polycondensation nematic liquid crystalline |
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