Thermal properties of some fully aromatic thermotropic liquid crystal polyesters |
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Authors: | Michael H B Skovby Robert Lessl Jorgen Kops |
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Institution: | Michael H. B. Skovby,Robert Lessél,Jorgen Kops |
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Abstract: | Wholly aromatic liquid crystalline main chain polyesters derived from terephthalic acid, phenyl- or (1-phenylethyl)hydroquinone modified with either 3,4′- or 4,4′-dicarboxydiphenylether and p-hydroxybenzoic acid, have been prepared by acidolysis and thermally investigated. All prepared polyesters exhibit excellent thermal stability up to about 400°C, however, the (1-phenylethyl)hydroquinone polyesters generally showed lower stability. Melting points could be decreased to around 200°C without any decrease in the thermal stability or the nematic range. |
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