AAS graft copolymer was synthesized from acrylonitrile, styrene and butyl acrylate ( BA ) by suspension graft method, with AIBN as initiator, hydroxypropylcellulose as dispersing agent at a proper water-oil ratio. 用悬浮接枝法,以丙烯腑、苯乙烯、丙烯酸丁酯为原料,偶氮二异丁腈为引发荆,羟丙基纤维素为分散剂,在一定的水油比下合成AAS三元接枝共聚物。