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Synthesis and curing of liquid crystalline epoxy resin based on naphthalene mesogen

✍ Scribed by Jun Yeob Lee; Jyongsik Jang

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
147 KB
Volume
37
Category
Article
ISSN
0887-624X

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✦ Synopsis

Aromatic liquid crystalline epoxy resin (LCE) based on naphthalene mesogen was synthesized and cured with aromatic diamines to prepare heat-resistant LCE networks. Diaminodiphenylester (DDE) and diaminodiphenylsulfone (DDS) were used as curing agents. The curing reaction and liquid crystalline phase of LCE were monitored, and mechanical and thermal properties of cured LCE network were also investigated. Curing and postcuring peaks were observed in dynamic DSC thermogram. LCE network cured with DDE displayed liquid crystalline phase in the curing temperature range between 183 and 260Β°C, while that cured with DDS formed one between 182 and 230Β°C. Glass transition temperature of cured LCE network was above 240Β°C, and crosslinked network was thermally stable up to 330Β°C.

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