Polyimides with the structure of semi-interpenetrating network as binding agents for carbon plastics

Easily melt-processed polyimides with the structure of a semi-interpenetrat ing network based on poly(ether imide) and two bis(maleimides) containing a fragment of 4,4'-bis(4 "-aminophenoxy)diphenyl sulfone were synthesized. B y varying the ratio between the initial components, [bis(maleimide) and pol y(etherimide)], and the chemical structure of bis(maleimide), one may contr ol the supermolecular and phase structures of polymers produced upon therma l solidification. Application of the synthesized polymers as binding agents allowed preparation of carbon plastics which combine an improved toughness of interlaminar fracture with a high level of strength properties and heat resistance.