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Improved processing of thermotropic liquid crystalline polyesters

✍ Scribed by Ronald N. Demartino

Publisher
John Wiley and Sons
Year
1983
Tongue
English
Weight
312 KB
Volume
28
Category
Article
ISSN
0021-8995

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✦ Synopsis

A series of thermotropic liquid crystalline polyesters based on p-hydroxybenzoic acid, terephthalic: acid, 2,6-dihydroxynaphthalene and containing small amounts of either Bisphenol A, 2,7-dihydroxynaphthalene, or polyethylene terephthalate (PET) as comonomers were prepared. The latter three materials were investigated as a means of lowering the spinning temperature of the base polymer without sacrificing properties. Samples containing 1-2.5% Bisphenol A or 2.5-5% 2,7-dihydroxynaphthalene retained most of the properties (modulus fell slightly), but spinning temperature re-. duction was minimal. Polymers containing 2.5-5% P E T retained full properties a t spinning tern-. peratures 60-80Β°C below the control.

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