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Liquid crystalline polyimides: 18. Thermotropic polyimides based on biphenyl-3,3′,4,4′-tetracarboxylic anhydride

✍ Scribed by Hans R. Kricheldorf; Volker Linzer


Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
941 KB
Volume
36
Category
Article
ISSN
0032-3861

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## Abstract New thermotropic liquid crystalline semi‐rigid homo‐ and copoly(ester‐imide)s composed of the 3,4:3″,4″‐__p__‐terphenyldicarboximide and/or the biphenyl unit and flexible aliphatic chains were prepared by polytransesterification using a dihexanol derivative of 3,4:3″,4″‐__p__‐terphenyld

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## Abstract __N__,__N__′‐Bis(ω‐hydroxyalkyl)‐3,4:3′,4′‐biphenyldicarboximide (__l__ = 3, 6) were prepared by a two‐step reaction (via intermediates) of 3,4:3′,4′‐biphenyltetracarboxylic dianhydride and ω‐amino‐alcohols. Polycondensation of dihydroxyalkyl derivatives of the 3,4:3′,4′‐biphenyldicarbo

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We have studied the nonisothermal and isothermal crystallization kinetics of an aromatic thermotropic liquid crystalline polyimide synthesized from 1,2,4,5-benzenetetracarboxylic dianhydride (PMDA) and 1,3-bis[4-(4-aminophenoxy) cumyl] benzene (BACB) by means of differential scanning calorimetry (DS

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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