Synthesis and characterization of liquid-crystalline block copolymers with cyanoterphenyl moieties by atom transfer radical polymerization

Kuan Wei Lee, Kung-Hwa Wei, Hong-Cheu Lin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

A series of new mesomorphic block copolymers composed of different macro-initiators, including poly(ethylene oxide), polystyrene, and poly(ethylene oxide)-b-polystyrene, and polymethacrylate with a pendent cyanoterphenyl group were synthesized through atom transfer radical polymerization. The number-average molecular weights of the three diblock copolymers, determined by gel permeation chromatography, were 10,254, 9,772, and 15,632 g mol -1, and their polydispersity indices were 1.17, 1.28, and 1.34. The mesomorphic and optical properties of all the block copolymers were investigated, and they possessed a smectic A phase with mesophasic ranges wider than 100°C. Moreover, X-ray diffraction patterns provided evidence of the smectic A phase and the corresponding interdigitated packing of all the polymers.

Original languageEnglish
Pages (from-to)4593-4602
Number of pages10
JournalJournal of Polymer Science, Part A: Polymer Chemistry
Volume44
Issue number15
DOIs
StatePublished - 1 Aug 2006

Keywords

  • Atom transfer radical polymerization (ATRP)
  • Block copolymers
  • Liquid-crystalline and photoluminescence properties
  • X-ray

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