Unsaturated oligoimides of cardic diamines and polymers based on them

Cardo polyheteroarylenes. Synthesis, properties, and characteristic features

“…In particular, thermoreactive polymers containing imide rings have been synthesised from the dianhydrides of tetracarboxylic acids and the corresponding diamines with subsequent blocking of the terminal amino-groups by the acrylic or methacrylic acid chlorides in the oligomeric amidoacid stage (Scheme 16a) or the oligoimide stage (Scheme 16b). 206 Unsaturated oligoimides obtained from cardo diamines and having terminal acrylamide and methacrylamide groups are amorphous substances readily soluble in dimethylformamide, dimethylacetamide, and tetrachloroethane with formation of concentrated solutions. Their softening temperatures can be regulated by varying the nature of the cardo group and the degree of polymerisation of the oligomer.…”

“…The thermal destruction develops vigorously only at temperatures above 400 °C. 206 Glass fibre-reinforced plastics with a low porosity and a high bending strength (4000 -5000 kgf cm~2) both at room and elevated temperatures have been prepared from solutions of unsaturated anilinefluorene-and anilineanthronebenzophenone-3,3',4,4'-tetracarboxylic acid oligoimides in JV-methylpyrrolidone. 259 The above unsaturated oligoimides have been used successfully to prepare copolymers with monomers such as iV-vinylpyrrolidone, JV-phenylmaleimide, and the bismaleimides obtained from various aliphatic diamines, the oligomers being readily soluble in such monomers.…”