Identifying smectic I phase of main-chain PB-10 polyester consisting of 4,4′-biphenol and 1,10-dodecanoic acid by fibre X-ray diffraction

DOI Web Site Web Site 被引用文献9件 参考文献14件

書誌事項

公開日
2012-11
資源種別
journal article
権利情報
  • https://www.elsevier.com/tdm/userlicense/1.0/
DOI
  • 10.1016/j.polymer.2012.09.035
公開者
Elsevier BV

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説明

Abstract Spinnable main-chain PB-10 liquid crystal (LC) polyester was obtained for the first time by solid state polymerization after conventional melt condensation of 4,4′-biphenol and 1,10-dodecanoic acid. The smectic LC phase oriented uniaxially in the fibre and exhibited an X-ray diffraction pattern attributable to a C-centred monoclinic unit cell with a  = 0.64 nm, b  = 0.90 nm, c  = 2.31 nm and β  = 126° with the c -axis parallel to the fibre axis. The type of mesophase can thus be identified as smectic I rather than smectic H, as speculated previously. Polymer chains are thus packed laterally into a hexagonal lattice and pass diagonally across the smectic layers. In the smaller angle region, the fibre exhibited a series of diffraction peaks attributed to lamellae stacking along the fibre direction with a spacing of 41 nm. The lamellae are thus perpendicular to the polymer chain axis and inclined to the smectic layer.

収録刊行物

  • Polymer

    Polymer 53 (24), 5596-5599, 2012-11

    Elsevier BV

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