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Thermotropic liquid-crystalline aromatic-aliphatic polyimides, 6. Poly(ester-imide)s based on 3,4: 3′,4′-biphenyldicarboximide

✍ Scribed by Moriyuki Sato; Tomohiro Hirata; Ken-ichi Mukaida

Publisher
John Wiley and Sons
Year
1994
Tongue
English
Weight
306 KB
Volume
15
Category
Article
ISSN
1022-1336

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A series of chiral copoly(ester-imide)s was prepared by polycondensation of N-(Ccarboxy-pheny1)trimellitimide with mixtures of isosorbide and phenylhydroquinone. All copolyesters are non-crystalline. They form a cholesteric melt, when containing more than 50 mol-% of phenylhydroquinone. Containing 5

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## Melt polycondensation of N,N'-bis(3-hydroxypropyl)- or N,N'-bis(6-hydroxyhexyl)benzophenonetetracarboxylic diimide (n = 3 and 6) and/or 6,6'-(4,4'-biphenylylenedioxy)dihexanol with propylene or hexamethylene bis(pheny1 carbonate)s (m = 3 and 6) afforded new semi-rigid homo-and copoly(imide-carb