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Blends of an epoxy thermosetting polymer with aromatic liquid‐crystalline polyesters
Author(s) -
Jasinski Wojciech,
Carlier Véronique,
Legras Roger,
Mormann Werner
Publication year - 2003
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/masy.200350827
Subject(s) - polyester , miscibility , thermosetting polymer , diglycidyl ether , materials science , epoxy , dynamic mechanical analysis , curing (chemistry) , glass transition , polymer chemistry , polymer , bisphenol a , chemical engineering , composite material , engineering
A series of aromatic liquid‐crystalline polyesters with different composition have been synthesized to adjust transition temperatures and molecular weight. Miscibility of polyesters with bisphenol‐A‐diglycidyl ether (DEGBA), 4,4′‐methylene‐bis(3‐chloro‐2,6‐dimethylaniline) (MCDEA) and the influence on transition temperatures has been studied. Miscibility of binary and ternary mixtures was found over the whole range of composition depending on the temperature. Thermoset formation by curing of LC‐polyester / DEGBA / MCDEA mixtures containing different amounts of polyester resulted in reaction‐induced phase separation with polyester content from 30 to 50 wt.%. Cloud point techniques, scanning electron microscopy (SEM) and dynamic mechanical thermal analysis (DMTA) have been applied.