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Liquid crystalline triblock copolymers. Mechanical behaviour and orientation under uniaxial strain
Author(s) -
Gronski W.,
Sänger J.
Publication year - 2001
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/1521-3900(200101)163:1<127::aid-masy127>3.0.co;2-3
Subject(s) - materials science , thermoplastic elastomer , polystyrene , elastomer , copolymer , polybutadiene , mesogen , composite material , liquid crystal , polymer , thermoplastic , modulus , liquid crystalline , phase (matter) , polymer chemistry , organic chemistry , chemistry , optoelectronics
The stress‐strain and orientation behaviour of side‐chain liquid crystalline(SLCP) ABA triblock copolymers with a backbone of polystyrene‐ block ‐1,2‐polybutadiene‐ block ‐polystyrene and a cyanobiphenyl mesogen in the side chain was investigated in dependence of molecular weight. The polymer shows the behaviour of a thermoplastic liquid crystalline elastomer(TPLCE) in the nematic phase in a region between the glass transitions of the polystyrene block and the SLCP. The ultimate properties and E‐modulus is lower than for conventional thermoplastic elastomers. Under uniaxial strain liquid crystalline order perpendicular to the direction of strain is induced.