【摘要】 辐射引发丙烯腈－丙烯酸甲酯－衣康酸三元沉淀共聚合张志成，葛学武，葛敏，张健（中国科学技术大学应用化学系，合肥，２３００２６）关键词聚丙烯腈，超高分子量，辐射引发，沉淀共聚合制备高性能的碳纤维，首先要制备优良的丙烯腈基原丝（ＳＡＦ）．ＳＡＦ聚合物具有超...更多还原

【Abstract】 The radiation induced precipitation copolymerization of acrylonitrile（AN）/methyl acrylate（MA）/itaconic acid（IA）in certain solvents was studied.High molecular weight AN/MA/IA copolymer（Mw≥5×10￣5）fitted for high property carbon fibre has been synthesized.The effects of dose,dose rate,monomer concentration and the composition of mediums on the molecular weight of copolymers have been investigated to determine the best polymerization conditions.The system with 25%monomer（AN/MA/IA=97/2/1）,30%DMFand 45%H₂O is a favorable one,D=22 Gy/min,R=2.2 kGy are the reasonable radiation conditions.更多还原