MISC

2003年7月

Morphological studies of a hydrogen-bonded LC polymer obtained by photopolymerization in LC solvents

LIQUID CRYSTALS
  • H Kihara
  • ,
  • T Miura
  • ,
  • R Kishi
  • ,
  • T Yoshida
  • ,
  • M Shibata
  • ,
  • R Yosomiya

30
7
開始ページ
799
終了ページ
809
記述言語
英語
掲載種別
DOI
10.1080/0267829031000120991
出版者・発行元
TAYLOR & FRANCIS LTD

Anisotropic morphologies and the phase behaviour of a hydrogen-bonded LC polymer obtained by photopolymeriiation in two kinds of LC solvent are discussed. The hydrogen-bonded LC monomer, 4-(6-acryloyloxyhexyloxy) benzoic acid (A6OBA), was photopolymerized in 4-cyano-4'-hexyloxybiphenyl (6OCB) and in 4-cyano-4'-undecyloxybiphenyl (11OCB), which show a nematic phase and a smectic A phase, respectively. After photopolymerization, the LC media were removed by extraction and the pure polymer was observed by scanning electron microscopy. SEM images showed that the polymer possessed fibrous morphology with a fibre diameter of a few micrometers, based on polymerization-induced phase separation. The overall geometries reflected typical LC characteristics such as schlieren and focal-conic fan textures. It was found that the hydrogen bond between benzoic acid groups in the monomer was rigid enough to fix the anisotropic phase-separated structure forming during the early stage of phase separation; however, it could not permanently maintain the fibre structure due to dissociation at elevated temperature. X-ray measurements revealed that a well developed layer structure of the hydrogen-bonded mesogen existed in the polymer obtained from the smectic phase of 11OCB, whereas a polymer layer structure could develop only partially from the nematic phase of 6OCB.

Web of Science ® 被引用回数 : 11

リンク情報
DOI
https://doi.org/10.1080/0267829031000120991
CiNii Articles
http://ci.nii.ac.jp/naid/80016022619
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000183955500005&DestApp=WOS_CPL
ID情報
  • DOI : 10.1080/0267829031000120991
  • ISSN : 0267-8292
  • CiNii Articles ID : 80016022619
  • Web of Science ID : WOS:000183955500005

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