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LC-polyimides—8. thermotropic poly(ester-imide)s from n-(4-carboxyphenyl)-4-nitrophthalimide

✍ Scribed by Hans R. Kricheldorf; Angelika Domschke; Sigrid Böhme

Publisher
Elsevier Science
Year
1992
Tongue
English
Weight
383 KB
Volume
28
Category
Article
ISSN
0014-3057

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✦ Synopsis

A~tract--Two imide monomers were prepared starting from 4-nitrophthalic anhydride, viz. N-(4'-carboxyphenyl), 4-(4'-carboxyphenoxy)phthalimide and its dimethylester. Nematic aromatic polyesters were prepared by polycondensation with chlorohydroquinone or phenylhydroquinone. Four polyesters were obtained by polycondensation with aliphatic diols. These "aliphatic polyesters" exclusively form isotropic melts but a smectic layer structure in the solid state. All the polyesters were characterized by elemental analyses, inherent viscosities, WAXS powder patterns, DSC measurements and optical microscopy.

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