APS－STS及Ce^（4＋）引发丙烯腈与壳聚糖的接枝共聚反应

Graft Copolymerization of Acrylonitrile onto Chitosan Initiated by APS-STS and Ce￣(4+)

采用过硫酸铵（ＡＰＳ）－硫代硫酸钠（ＳＴＳ）及Ｃｅ￣（４＋）分别引发丙烯腈与壳聚糖接枝共聚反应，ＩＲ及ＳＥＭ表征了接枝共聚物的结构。当［Ｃｅ￣（４＋）］＝（６－８）×１０￣（－３）ｍｏｌ／ｌ；［ＡＮ］＝（５－６）×１０｀（－１）ｍｏｌ／ｌ；壳聚糖＝０．７５ｇ／１００ｍ１；４０°Ｃ；反应５小时及当［ＡＰＳ］＝［ＳＴＳ］５×１０￣－３ｍｏｌ／ｌ；［ＡＮ］＝６×ｌ０￣（－１）ｍｏｌ／ｌ；壳聚糖＝２．０ｇ／１００ｍ１；６０°Ｃ；反应５小时时，所得接枝共聚物的接枝率（Ｇ）及接枝支链的分子量均较高。

Graft copolymerization of acrylonitrile(AN)onto chitosan respectively initiated byammonium persulfate-sodium thiosulpliate(APS-STS)and Ce￣(4+)was studied.The structurewas eharacterized by IR and SEM. The maximum G(%)and side-chain molecular weightwere obtained at [Ce￣(4+)]=6-8×10￣(-3)mol/l,[AN]=5-6×10￣(-1)mol/l,chitosan=0.75g/100ml.40℃ for 5h when Ce￣(4+) was used and at [APS]=[STS]=5×10￣(-3)mol/l,[AN]=0.6mol/l,chitosan=2.0g/100ml,60℃ for 5h When APS～STS was used.