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Synthesis of new side‐group liquid crystalline block copolymers by living anionic polymerization
Author(s) -
Lehmann Olaf,
Förster Stephan,
Springer Jürgen
Publication year - 2000
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/(sici)1521-3927(20000201)21:3<133::aid-marc133>3.0.co;2-4
Subject(s) - copolymer , thermotropic crystal , differential scanning calorimetry , molar mass , polymer chemistry , styrene , polystyrene , living anionic polymerization , anionic addition polymerization , materials science , polymerization , living polymerization , liquid crystalline , liquid crystal , polymer , radical polymerization , composite material , physics , optoelectronics , thermodynamics
A new series of AB liquid crystalline (lc) block copolymers was synthesized via living anionic copolymerization of styrene as segment A and 6‐[4‐(4‐cyanophenylazo)phenoxy]hexyl methacrylate ( 1 ) as segment B. The copolymers were successfully prepared in quantitative yields and with narrow molar mass distributions. The number‐average molar mass of the segments was varied well‐defined. The polystyrene block ranged from 3 500 to 7 400 g/mol. The content of the B segment ranged from 1 to 54 wt.‐%. Thermotropic phases were detected by differential scanning calorimetry (DSC) for block copolymers with an lc segment of more than 30 wt.‐%.