| SYNTHESIS AND CHARACTERIZATION OF SOME THERMOTROPIC LIQUID CRYSTALLINE POLYAMIDES |
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| 作者姓名： | 周德亮 张东 Samuel K.L.TAH 周其凤 |
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| 作者单位： | Department of Polymer Science & Engineering College of Chemistry，Peking University，Beijing 100871，China，Department of Polymer Science & Engineering College of Chemistry，Peking University，Beijing 100871，China，Department of Polymer Science & Engineering College of Chemistry，Peking University，Beijing 100871，China，Department of Polymer Science & Engineering College of Chemistry，Peking University，Beijing 100871，China |
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| 基金项目： | This work is supported by the National Natural Science Foundation of China |
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| 摘 要： | A series of novel mesogenic polyamides containing a flexible pendent side group wassynthesized by solution condensation polymerization. The new monomers, diacids and di-amines containing flexible elements of diferent lengths, were also synthesized and character-ized by ~1HNMR, mass spectroscopy and elemental analysis. The polymers were character-ized by viscosity measurements, differential scanning calorimetry (DSC), X-ray diffiactionand polarizing optical microscopy These studies revealed that polyamides containingflexible elements of a sufficient length exhibited thermotropic liquid crystalline(LC) pro-perties. The melting temperatures of this series of polymers were particularly sensitive tothe length of the flexible segment on the main chain and that of the flexible pendent esterside chain. Lyotropic LC behaviours were also observed in solution.
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| 收稿时间： | 1997-04-02 |
SYNTHESIS AND CHARACTERIZATION OF SOME THERMOTROPIC LIQUID CRYSTALLINE POLYAMIDES* |
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| ZHOU Deliang,ZHANG Dong,Samuel K.L. TAN,ZHOU Qifeng.SYNTHESIS AND CHARACTERIZATION OF SOME THERMOTROPIC LIQUID CRYSTALLINE POLYAMIDES[J].Chinese Journal of Polymer Science,1997,0(4):353-361. |
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| Authors: | ZHOU Deliang ZHANG Dong Samuel KL TAN ZHOU Qifeng |
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| Institution: | Department of Polymer Science & Engineering; College of Chemistry; Peking University; Beijing 100871; China |
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| Abstract: | A series of novel mesogenic polyamides containing a flexible pendent side group wassynthesized by solution condensation polymerization. The new monomers, diacids and di-amines containing flexible elements of diferent lengths, were also synthesized and character-ized by ~1HNMR, mass spectroscopy and elemental analysis. The polymers were character-ized by viscosity measurements, differential scanning calorimetry (DSC), X-ray diffiactionand polarizing optical microscopy These studies revealed that polyamides containingflexible elements of a sufficient length exhibited thermotropic liquid crystalline(LC) pro-perties. The melting temperatures of this series of polymers were particularly sensitive tothe length of the flexible segment on the main chain and that of the flexible pendent esterside chain. Lyotropic LC behaviours were also observed in solution. |
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| Keywords: | Thermotropic liquid crystals Mesogenic polyamides Nematic mesophase |
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