The effect of molecular weight on the thermal properties of polystyrene-based sidechain liquid-crystalline polymers

C. T. Imrie, F. E. Karasz, G. S. Attard

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Sidechain liquid-crystalline polymers were prepared by the derivatization of three poly(4-hydroxystyrene) fractions of different molecular weights (Mw= 1.0 x 104, 2.2 x 104, and 3.0 x 104). 4-Cyanoazobenzene and 4-cyanobiphenyl were incorporated as mesogenic groups with ether-linked methylene spacers of varying length. The polymers all exhibited a smectic A phase, with the exception of the propyl member of the cyanobiphenyl series for which no liquid-crystalline behavior was observed. For short spacers the thermal properties were insensitive to molecular weight changes in the backbone, whereas small but consistent differences in the transition temperatures and entropies were observed as the number of methylene groups in the spacer increased.

Original languageEnglish
Pages (from-to)1221-1232
Number of pages12
JournalJournal of Macromolecular Science, Part A
Volume31
Issue number9
DOIs
Publication statusPublished - 1 Sep 1994

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Polymers and Plastics
  • Materials Chemistry

Fingerprint Dive into the research topics of 'The effect of molecular weight on the thermal properties of polystyrene-based sidechain liquid-crystalline polymers'. Together they form a unique fingerprint.

  • Cite this