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Blends of a Main Chain Liquid-Crystalline Polyester with a Diepoxide and with a Diepoxide/Amine Mixture Prepared in a Twin-Screw Extruder

✍ Scribed by Werner Mormann; Tomasz Pokropski

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
315 KB
Volume
289
Category
Article
ISSN
1438-7492

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✦ Synopsis

Abstract

Summary: Blending of the commercial LC‐polyester Rodrun LC‐3000 with the bisphenol‐A‐diglycidyl ether based diepoxide DOW D.E.R.330 alone and with the mixture of the diamine (MCDEA) and D.E.R.330 by means of a twin‐screw extruder has been investigated. Conditions to suppress curing of epoxide and amine during blending have been established. Due to the very low solubility of Rodrun in the diepoxide only LCP‐rich blends with a minimum content of 60 wt.‐% Rodrun could be obtained. The blends were investigated by SEM and thermal analysis (DSC, DMTA). Binary blends are immiscible while ternary blends appear miscible from DMTA up to 30 wt.‐% of epoxy/amine.

SEM micrograph of Rodrun moulded at 230 °C.

magnified imageSEM micrograph of Rodrun moulded at 230 °C.

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