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Influence of crosslinking conditions on the phase behavior of a polyacrylate‐based liquid‐crystalline elastomer
Author(s) -
Zubarev Eugene R.,
Talroze Raissa V.,
Yuranova Tatyana I.,
Vasilets Victor N.,
Platé Nicolai A.
Publication year - 1996
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.1996.030170107
Subject(s) - liquid crystal , materials science , elastomer , phase (matter) , isotropy , polymer chemistry , sodium polyacrylate , chemical engineering , composite material , organic chemistry , optics , chemistry , raw material , physics , optoelectronics , engineering
The influence of crosslinking conditions (γ‐radiation‐induced and chemical crosslinking above and below the clearing point) on the phase behavior of a liquid‐crystalline polyacrylate‐based elastomer is shown and discussed. The network formation in samples γ‐irradiated in the nematic phase results in an increase of the clearing point T n‐i which does not depend on the crosslinking density expressed as the ratio of weight‐average molecular weight over number‐average molecular weight between crosslinks M w / M c within a wide M w / M c range. The distorting action of the crosslinking agent at the same temperature leads to the opposite tendency in the change of T n‐i . Crosslinking in the isotropic phase shows a strong decrease in T n‐i .