In order to improve the stabilization and spinnability of polyacrylonitrile,a bifunctional comonomer containing both ester and amide groups was synthesized to prepare poly(acrylonitrile-co-3-aminocarbonyl-3-butenoic acid methyl ester) [P(AN-co-ABM)] copolymers used as the carbon fiber precursor instead of poly(acrylonitrile-acrylamide-methyl acrylate) [P(AN-AM-MA)] terpolymer.The differential scanning calorimetry and thermogravimetry results show that the stabilization of P(AN-coABM) have been remarkably improved by ABM compared with P(AN-AM-MA) terpolymer,such as lower initiation temperature,broadened exothermic peak and smaller activation energy.Moreover,the spinnability of P(AN-co-ABM) is also improved by ABM due to the lubrication of ester groups in ABM.This study clearly shows that P(AN-co-ABM) copolymer is a better material for use as a carbon fiber precursor than P(AN-AM-MA) terpolymer.
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