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Unsaturated para ‐linked aromatic LC polyesters: Thermotropic and lyotropic systems
Author(s) -
Skrifvars Mikael,
Schmidt HansWerner
Publication year - 1995
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1995.070551309
Subject(s) - thermotropic crystal , thermosetting polymer , lyotropic , polyester , monomer , polymer , materials science , liquid crystal , polymer chemistry , lyotropic liquid crystal , styrene , solvent , organic chemistry , chemical engineering , chemistry , copolymer , liquid crystalline , optoelectronics , engineering
Liquid‐crystalline thermosets (LCT) are a new class of materials which combine typical properties of LC polymers with those of conventional thermosets. This article reports on the development of a lyotropic LC thermoset (LLCT) in which the solvent is a vinyl monomer. Such an LLCT is expected to have several advantages compared to conventional unsaturated polyester resins. The synthesis and characterization of a variety of novel substituted para ‐linked aromatic polyesters and copolyesters containing unsaturated fumaroyl units is presented. The thermal and liquid crystal properties were investigated. It is demonstrated that it is possible to prepare a lyotropic LC solution in styrene. These lyotropic solutions are capable of thermal crosslinking by the addition of a free‐radical initiator. © 1995 John Wiley & Sons, Inc.