Liquid-crystalline stereoregular polyketone prepared from a mesogenic vinylarene and carbon monoxide |
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| Authors: | Yasutoyo Kawashima Kyoko Nozaki Tamejiro Hiyama Masafumi Yoshio Kiyoshi Kanie Takashi Kato |
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| Institution: | 1. Department of Material Chemistry, Graduate School of Engineering, Kyoto University, Yoshida, Sakyo-ku, Kyoto 606-8501, Japan;2. Department of Chemistry & Biotechnology, School of Engineering, University of Tokyo, Hongo, Bunkyo-ku, Tokyo 113-8656, Japan |
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| Abstract: | Isotactic and syndiotactic polyketones were synthesized by the alternating copolymerizations of a mesogenic vinylarene, 4-cyano-4′-8-(4-vinylphenyl)octyl-1-oxy]biphenyl, with carbon monoxide, and this revealed the influence of backbone tacticity on their thermal properties. The isotactic polyketone was an amorphous polymer that did not show any mesophase, whereas the syndiotactic polyketone exhibited liquid crystallinity. © 2003 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 41: 3556–3563, 2003 |
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| Keywords: | side-chain liquid-crystalline polymers polyketones tacticity chiral liquid-crystalline polymers stereospecific polymers |
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