摘要
采用丙烯腈（ＡＮ）与衣康酸（ＩＡ）共聚，纺制了碳纤维前驱体聚丙烯腈原丝． 利用元素分析，ＩＲ，１３Ｃ－ ＮＭＲ，ＤＳＣ，ＴＧ等手段对该聚丙烯腈原丝的结构和性能进行了表征．用Ｋｅｌｅｎ—Ｔｕｄｏｓ法测定了ＡＮ与ＩＡ共聚的竟聚率：ｒＡＮ＝ ０．３９，ｒＩＡ＝ ３．８５．研究结果表明：共聚单体ＩＡ能在较低温度时以离子机理形式引发聚丙烯腈原丝的氧化、环化放热反应，且能减缓放热效应．
Free radical solution copolymerization of itaconic acid and acrylonitrile is carried out to spin polyacrylonitrile precursors.These are characterized by IR, 13 C NMR,DSC,TG and so on.The copolymer compositions are determined by elemental analysis for nitrogen and the results calculated by the Kelen-Tudos method.The reactivity ratios determined in this study are: r AN =0.39, r IA =3.85.Furthermore,in the case of P(AN co IA) copolymers ,the cyclization starts at a lower temperature and propagates at a slower rate .
基金
国家自然科学基金!(59783002)
山东省科委资助
