Liquid‐crystalline polyimides, 23 . Photoreactive, cholesteric copoly(ester‐imide)s derived from 1,4‐phenylenediacrylic acid and 4‐aminobenzoic trimellitimide | Zendy

Kricheldorf Hans R. | Zendy; Probst Nicolas | Zendy

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Liquid‐crystalline polyimides, 23 . Photoreactive, cholesteric copoly(ester‐imide)s derived from 1,4‐phenylenediacrylic acid and 4‐aminobenzoic trimellitimide

Author(s) -

Kricheldorf Hans R.,

Probst Nicolas

Publication year - 1995

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.1995.021961106

Subject(s) - imide , polymer chemistry , solid state , shearing (physics) , materials science , polymer , optical microscope , chemistry , liquid crystalline , organic chemistry , composite material , scanning electron microscope

The dichlorides of commercial 1,4‐phenylenediacrylic acid 3,3′‐(1,4‐Phenylene)di‐2‐propenoic acid. and N ‐(4‐carboxyphenyl)‐trimellitimide were polycondensed with a chiral spacer prepared from ( S )‐3‐bromo‐2‐methylpropanol and 4‐mercaptophenol. Optical microscopy revealed that all the resulting copoly(ester‐imide)s form an enantiotropic cholesteric melt and adopt a Grandjean texture upon slight shearing. The WAXD powder patterns indicate the formation of a layered structure in the solid state. Irradiation with UV light of wavelength ⩽ 360 nm allows crosslinking at any temperature above 25°C.

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