| INFLUENCE OF BACKBONE RIGIDITY ON THE LIQUID CRYSTALLINITY OF MESOGEN-CONTAINING POLYACETYLENES |
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| 作者姓名： | 孔祥兴 宛新华 郭海成 冯新德 唐本忠 |
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| 作者单位： | Departments of Chemistry Hong Kong University of Science & Technology，Clear Water Bay，Kowloon，Hong Kong，Departments of Chemistry Hong Kong University of Science & Technology，Clear Water Bay，Kowloon，Hong Kong，Departments of Electrical & Electronic Engineering，Hong Kong University of Science & Technology，Clear Water Bay，Kowloon，Hong Kong，Department of Chemistry，Peking University，Beijing 100871，China，Departments of Chemistry Hong Kong University of Science & Technology，Clear Water Bay，Kowloon，Hong Kong |
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| 基金项目： | This work was in part supported by the Hong Kong RGC grants HKUST597/95P and HKUST6149/97P. |
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| 摘 要： | Two acetylene polymers containing cyanobiphenyl-based mesogens,poly { 10- ((4'- cyano-4-biphenylyl ) oxy ) carbonyl] - 1 -decyne } (PA8CN ), which has a relativelyfiexible polyalkyne backbone, and poly {4-(((12-((4'-cyano-4-biphenylyl)oxy)dodecyl)oxy)carbonyl) phenyl]-acetylene} (PB12CN), which has a fairly rigid poly (phenylacetylene )backbone, were synthesized using respectively WCl_6 and Rh(nbd)Cl]_2 as the catalysts.PA8CN exhibits enantiotropic interdigitated smectic A phase (S_(Ad)) over a temperaturerange as wide as ca. 100℃, whereas PB12CN is non-mesomorphic, demonstrating thatthe backbone rigidity plays an important role in determining the liquid crystallinity of thepolyacetylenes.
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| 关 键 词： | Polyacetylene Polyalkynes Poly （phenylacetylene） Substituted polyacetylenes Liquid crystalline polymers |
| 收稿时间： | 1997-10-03 |
INFLUENCE OF BACKBONE RIGIDITY ON THE LIQUID CRYSTALLINITY OF MESOGEN-CONTAINING POLYACETYLENES* |
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| KONG XiangXing,WAN Xinhua,KWOK Hoi Sing,FENG Xinde,TANG Benzhong.INFLUENCE OF BACKBONE RIGIDITY ON THE LIQUID CRYSTALLINITY OF MESOGEN-CONTAINING POLYACETYLENES[J].Chinese Journal of Polymer Science,1998,0(2):185-192. |
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| Authors: | KONG XiangXing WAN Xinhua KWOK Hoi Sing FENG Xinde TANG Benzhong |
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| Institution: | Departments of Chemistry and Electrical & Electronic Engineering; Hong Kong University of Science & Technology; Clear Water Bay; Kowloon; Hong Kong Department of Chemistry; Peking University; Beijing 100871; China |
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| Abstract: | Two acetylene polymers containing cyanobiphenyl-based mesogens,poly { 10- ((4'- cyano-4-biphenylyl ) oxy ) carbonyl] - 1 -decyne } (PA8CN ), which has a relativelyfiexible polyalkyne backbone, and poly {4-(((12-((4'-cyano-4-biphenylyl)oxy)dodecyl)oxy)carbonyl) phenyl]-acetylene} (PB12CN), which has a fairly rigid poly (phenylacetylene )backbone, were synthesized using respectively WCl6 and Rh(nbd)Cl]2 as the catalysts.PA8CN exhibits enantiotropic interdigitated smectic A phase (SAd) over a temperature range as wide as ca.100℃,whereas PB12CN is non-mesomorphic,demonstrating that the backbone rigidity plays an important role in determining the liquid crystallinity of the polyacetylenes. |
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| Keywords: | Polyacetylene Polyalkynes Poly (phenylacetylene) Substituted polyacetylenes Liquid crystalline polymers |
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