Applications of composite initiator used in aqueous deposited polymerization for polyacrylonitrile

Acrylonitrile and itaconic acid copolymer,which is used in carbon fiber,was synthesized by the continuous aqueous deposited polymerization using composite redox initiator.The effect of different composite initiator,monomer ratio,polymerization temperature and initiator ratio on the copolymerization were investigated.From the results,it showed that using ammonium persulfate and ammonium sulfite to be composite initiator,the copolymerization temperature was reduced by a third when the conversion rate remains the same.The composite initiator has a positive effect on the thermal performance of polymer.