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High‐temperature reactive thermoplastic aromatic polyimides
Author(s) -
Reinhardt Bruce A.,
Arnold Fred E.
Publication year - 1981
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1981.070260817
Subject(s) - glass transition , materials science , thermoplastic , copolymer , thermoforming , polymer , polymer chemistry , solvent , benzene , composite material , chemical engineering , organic chemistry , chemistry , engineering
A series of high molecular weight aromatic enyne polyimides were prepared by the condensation of various aromatic dianhydrides with (E)‐1,3‐bis(3‐aminophenyl)‐1‐buten‐3‐yne. The polymers were soluble in common organic solvents and exhibited intrinsic viscosities as high as 0.43 (in DMAC at 30°C) with glass transition temperatures ranging from 200 to 265°C. The new thermoplastic materials have the capability to become lightly crosslinked when thermally treated during a stimulated high‐temperature thermoforming process. Thermal treatment diminishes the various solvent‐induced problems inherent in linear polymeric materials and advances the glass transition temperature. Copolymers were also prepared using 1,3‐bis(3‐aminophenoxy)benzene and (E)‐1,3‐bis(3‐aminophenyl)‐1‐buten‐3‐yne in an effort to obtain various percentages of enyne along the polymer backbone and, therefore, control the degree of crosslinking. The solvent resistance of selected copolymer compositions both in neat resin and thermoplastic composite form was evaluated.