NiSO_4改性对聚丙烯腈原丝及其碳纤维结构与性能的影响

EFFECT OF NiSO_4 ON THE STRUCTURE AND PROPERTIES OF PAN PRECURSORS AND RESULTANT CARBON FIBRES

Free\|radical solution copolymerization of itaconic acid and acrylonitrile was carried out in DMSO at 58～60℃ using azodiisobutyronitrile as initiator.The resulting polymerization solution was spun to form PAN precursors of carbon fibres.The precursors were treated with NiSO 4 aqueous solution at 95℃ on line.The structure and properties of untreated and treated PAN precursors and resultant carbon fibres were characterized by IR,SEM,dynamic viscoelasticity study,stabilization process and so on.It was suggested that carbon fibres developed from modified PAN fibres showed an improvement in tensile strength by about 20%～30% and Young’s modulus by about 5%～10%.

Free-radical solution copolymerization of itaconic acid and acrylonitrile was carried out in DMSO at 58 similar to 60 degreesC using azodiisobutyronitrile as initiator. The resulting polymerization solution was spun to form PAN precursors of carbon fibres. The precursors were treated with NiSO4 aqueous solution at 95 degreesC on line. The structure and properties of untreated and treated PAN precursors and resultant carbon fibres were characterized by IR, SEM, dynamic viscoelasticity study, stabilization process and so on. It was suggested that carbon fibres developed from modified PAN fibres showed an improvement in tensile strength by about 20% - 30% and Young's modulus by about 5% - 10%.