Liquid-crystalline symmetric triblock copolymers

M. G Ivanov, N. I Boiko, E. V Chernikova, RM Richardson, X. -M Zhu, V. P. Shibaev

Research output: Contribution to journalArticle (Academic Journal)

5 Citations (Scopus)

Abstract

Symmetric fully liquid-crystalline triblock copolymers of various structures containing optically active mesogenic groups are for the first time synthesized via pseudoliving radical reversible addition-fragmentation chain-transfer polymerization. Their phase behavior and physicochemical and optical properties are studied. It is shown that, depending on composition, at low temperatures block copolymers can form at temperatures phase-separated structures caused by microsegregation of blocks of different chemical natures and that, with an increase in temperature, these structures can mix to form a cholesteric mesophase characterized by a helical supramolecular structure. A model illustrating the molecular packing of block copolymers with a phase-separated lamellar structure is advanced. The effect of the molecular structure of the block copolymers on their optical properties is discussed.
Translated title of the contributionLiquid-crystalline symmetric triblock copolymers
Original languageEnglish
Pages (from-to)633 - 644
JournalPolymer Science Series A
Volume53
Publication statusPublished - 2011

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