【摘要】 <正> 近年,我们在探索价廉、无毒的淀粉接枝引发剂时,采用Fe²⁺-H₂O₂引发丙烯腈与玉米淀粉接枝共聚反应,制得吸水率为700～1500倍的高吸水性树脂,应用试验表明,此种材料在干旱地区农作物春播育苗及园艺等方面有广阔的应用前景。 一、实验部分 1.原料与试剂:玉米淀粉为长春市淀粉厂产,工业级,含水量为12％,丙烯腈:北京化工厂产,AR级;硫酸亚铁铵:北京化工厂产,AR级;过氧化氢;上海化学试剂厂产,AR级。更多还原

【Abstract】 A ferrous ion-hydrogen peroxide initiation system was uscd to prepare corn starch-g-polyacrylonitrile copolymers. In IR spectra of reaction products （Fig. 1, Curve 2） an absorption band appeared at 2 246cm^-1 attributed to—CN group of acrylonitrile, absorption bands appeared at 570cm^-1,750cm^-1, 850cm^-1 and 1 027～1 150cm^-1 due to corn starch.Making a comparison with curves 1,2 and 3, the reaction products are graft copolymers of acrylonitrile and corn starch. The graft copolymers were saponified in an aqueous sodium hydroxide solution and dried to give highly water-absorptive H-SPAN resin which absorbed 500～1500ml H₂O per gram and 40～80ml synthetic urine per gram.更多还原