Thermotropic liquid‐crystalline aromatic‐aliphatic polyimides, 7 . Poly(ester‐imide)s based on 3,4:3″,4″‐ p ‐terphenyldicarboximide | Zendy

Sato Moriyuki | Zendy; Ujiie Seiji | Zendy; Hirata Tomohiro | Zendy

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Thermotropic liquid‐crystalline aromatic‐aliphatic polyimides, 7 . Poly(ester‐imide)s based on 3,4:3″,4″‐ p ‐terphenyldicarboximide

Author(s) -

Sato Moriyuki,

Ujiie Seiji,

Hirata Tomohiro

Publication year - 1996

Publication title -

macromolecular chemistry and physics

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.57

H-Index - 112

eISSN - 1521-3935

pISSN - 1022-1352

DOI - 10.1002/macp.1996.021970914

Subject(s) - thermotropic crystal , mesogen , liquid crystal , differential scanning calorimetry , imide , biphenyl , polymer chemistry , copolymer , monomer , materials science , liquid crystalline , polarized light microscopy , phase (matter) , chemistry , crystallography , polymer , organic chemistry , physics , optoelectronics , optics , thermodynamics

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 ‐terphenyldicarboximide and/or a dioxydihexanol of biphenyl as monomers. Differential scanning calorimetry (DSC) measurements, polarizing microscope observations and powder X‐ray analyses at various temperatures indicated that the homopolymer containing the 3,4:3″,4″‐ p ‐terphenyldicarboximide unit forms a smectic phase and the copolymers a nematic phase. It is suggested that the 3,4:3″,4″‐ p ‐terphenyldicarboximide unit acts as a good mesogen.

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