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水溶液聚合法合成直链聚AA/AM,再分别混合3种后交联剂:丙三醇二缩水甘油醚(GDE)、聚乙二醇二缩水甘油醚(PGDE)、三聚氰胺甲醛树脂(MF),通过后交联反应制备出高吸水性树脂。结果表明:当丙烯酸中和度为65%,单体浓度为20%,丙烯酰胺用量和引发剂用量占单体质量的40%和0.4%,3种后交联剂用量依次占初始线性聚合物质量的0.03%、0.07%、0.5%,后交联温度为60℃、80℃、60℃时,高吸水性树脂吸去离子水倍率达到2089g/g、2824g/g、1455g/g。
Linear poly (AA) / AM was synthesized by aqueous solution polymerization. Three kinds of postcrosslinking agents were mixed respectively: glycerol diglycidyl ether (GDE), polyethylene glycol diglycidyl ether (PGDE), melamine formaldehyde resin , Through the post-crosslinking reaction to prepare a superabsorbent resin. The results showed that when the degree of neutralization of acrylic acid was 65%, the concentration of monomer was 20%, the amount of acrylamide and the amount of initiator accounted for 40% and 0.4% of the monomer mass, the amount of three kinds of postcrosslinking agents in turn occupied the initial linear polymer The results showed that the superabsorbent water absorption ratio of deionized water reached to 2089g / g, 2824g / g and 1455g / g when the mass percentages of 0.03%, 0.07%, 0.5% and postcrosslinking temperature were 60 ℃, 80 ℃ and 60 ℃.