| SYNTHESIS AND CHARACTERIZATION OF MAIN CHAIN AROMATIC LIQUID CRYSTAL COPOLYESTERS WITH X-SHAPED AND ROD-SHAPED MESOGENIC UNITS |
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| 作者姓名： | 李自法 李磊 张淑媛 郑世军 曹少魁 赵丽婷 周其凤 |
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| 作者单位： | Department of Materials Engineering，Zhengzhou University，Zhengzhou，450052，China，Department of Materials Engineering，Zhengzhou University，Zhengzhou，450052，China，Department of Materials Engineering，Zhengzhou University，Zhengzhou，450052，China，Department of Materials Engineering，Zhengzhou University，Zhengzhou，450052，China，Department of Materials Engineering，Zhengzhou University，Zhengzhou，450052，China，Department of Materials Engineering，Zhengzhou University，Zhengzhou，450052，China，Dept. of Polym. Sci. and Eng.，the College of Chemistry，Peking Univ.，Beijing 1000871，China |
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| 基金项目： | The work was supported by the National Natural Science Foundation of China. |
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| 摘 要： | A series of main chain liquid crystal aromatic copolyesters with X-shapedand rod-shaped mesogenic units were synthesized via solution condensation polymerizationsof 4, 4'-(α,ω-octanedioyloxy)-dibenzoyl dichlorides with 2,5-bis(p-octanoxy benzoyloxy)-hydroquinone and diphenol. All of the copolyesters showed thermotropic liquid crystallinebehaviors through observations using DSC, polarized microscopy and X-ray diffraction.The melting point (T_m) and the isotropization temperature (T) change regularly withvarying the content of diphenol unit in the copolymers.
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| 收稿时间： | 1997-03-06 |
SYNTHESIS AND CHARACTERIZATION OF MAIN CHAIN AROMATIC LIQUID CRYSTAL COPOLYESTERS WITH X-SHAPED AND ROD-SHAPED MESOGENIC UNITS* |
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| LI Zifa,LI Lei,ZHANG Shuyuan,ZHENG Shijun,CAO Shaokui,ZHAO Liting,ZHOU Qifeng.SYNTHESIS AND CHARACTERIZATION OF MAIN CHAIN AROMATIC LIQUID CRYSTAL COPOLYESTERS WITH X-SHAPED AND ROD-SHAPED MESOGENIC UNITS[J].Chinese Journal of Polymer Science,1998,0(1):48-55. |
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| Authors: | LI Zifa LI Lei ZHANG Shuyuan ZHENG Shijun CAO Shaokui ZHAO Liting ZHOU Qifeng |
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| Institution: | Department of Materials Engineering; Zhengzhou University; Zhengzhou; 450052; China Dept. of Polym. Sci. and Eng.; the College of Chemistry; Peking Univ.; Beijing 1000871; China |
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| Abstract: | A series of main chain liquid crystal aromatic copolyesters with X-shapedand rod-shaped mesogenic units were synthesized via solution condensation polymerizationsof 4, 4'-(α,ω-octanedioyloxy)-dibenzoyl dichlorides with 2,5-bis(p-octanoxy benzoyloxy)-hydroquinone and diphenol. All of the copolyesters showed thermotropic liquid crystallinebehaviors through observations using DSC, polarized microscopy and X-ray diffraction.The melting point (Tm) and the isotropization temperature (Ti) change regularly with varying the content of diphenol unit in the copolymers. |
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| Keywords: | Liquid crystal polymer X-shaped and rod-shaped mesogenic units Aromatic copolyester Synthesis and characterization |
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