Side-Group Liquid Crystal Copolymers Containing Nonmesogenic Units: Dependence of the Thermal Behaviour upon Composition

Andrew G. Cook, Corrie T. Imrie

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The synthesis and properties of a new mesogenic/nonmesogenic copolymer system, namely the poly [6-(4'-methoxyazobenzene-4'-oxy)hexyl methacrylate]-co-poly[methyl methacry late]s, are described. Copolymers containing 0.59 or greater mol fraction of the mesogenic side-groups exhibit nematic behaviour while those containing 0.39 or less mol fraction mesogen are amorphous. The glass transition temperatures exhibit a negative deviation from linear behaviour on varying the copolymer composition. In contrast, the nematic-isotropic transition temperatures decrease in an essentially linear fashion on increasing the nonmesogen content, This behaviour is compared with that of a smectogenic series and differences are accounted for in terms of a microphase separated smectic phase.

Original languageEnglish
Pages (from-to)189-198
Number of pages10
JournalMolecular Crystals and Liquid Crystals Science and Technology. Section A, Molecular Crystals and Liquid Crystals
Volume332
Issue number1
DOIs
Publication statusPublished - 1999

Keywords

  • liquid crystal side-group copolymers
  • nonmesogenic units
  • polymethacrylate derivatives
  • azobenzene
  • HETEROCYCLOALKANEDIYL GROUPS
  • MICROPHASE SEPARATION
  • POLYMERS
  • MESOGENS

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