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Liquid‐crystalline main‐chain elastomers
Author(s) -
Bergmann Gerd H. F.,
Finkelmann Heino,
Percec Virgil,
Zhao Mingyang
Publication year - 1997
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/marc.1997.030180501
Subject(s) - elastomer , hydrosilylation , liquid crystal , chain (unit) , materials science , composite material , liquid crystalline , side chain , long chain , field (mathematics) , polymer science , polymer chemistry , polymer , chemistry , organic chemistry , physics , optoelectronics , mathematics , astronomy , catalysis , pure mathematics
A main‐chain elastomer was synthesized for the first time by a cross‐linking hydrosilylation of a cyclosiloxane with a new main‐chain liquid crystalline semiflexible polyether. Imposing a uniaxial mechanical field to the unstretched nematic polydomain sample results in a macroscopic alignment of the director. For this process the sample has to be stretched by a factor of about 5, which considerably exceeds the effect observed for nematic side‐chain elastomers.