1H, 13C, 14N and 15N NMR Study of copolycondensates obtained by 1, 3 dipolar cycloaddition of α, ω‐diazidoalkanes with 1, 1'‐(methylene di‐4, 1‐phenylene) bismaleimide, with N, N'‐1, 4‐phenylene dimaleimide and with isopropylidene‐1, 4‐phenylene dimethacrylate

Abstract

AbstractCopolycondensates of α, ω‐diazidoalkanes with 1, 1'‐(methylenedi‐4, 1‐phenylene) bismaleimide, with N, N'‐1, 4‐phenylene dimaleimide and with isopropylidene‐1, 4‐phenylene dimethacrylate were synthetized using 1, 3 dipolar cycloaddition reaction (DCA). Their structures were determined by 1H, 13C, 14N, 15N NMR. The results show that at high temperature (150°C), the copolycondensates present a mixture of triazoline/succinimide, of aziridine/succinimide, of enamine/maleimide and of anil/succinimide junctions. At low temperature (20°C), only the triazoline structure is formed. A reaction scheme is proposed via two reactions, DCA and nitrene formation, occuring simultaneously and independently.