【摘要】 以过硫酸铵 亚硫酸钠为引发剂,用反相悬浮法合成丙烯酸/2 丙烯酰胺基 2 甲基丙烷磺酸共聚型吸水树脂。最佳工艺条件为:N,N 亚甲基双丙烯酰胺浓度=1.082mmol·L-1,丙烯酸中和度为80%,2 丙烯酰胺基 2 甲基丙烷磺酸的质量分数w=0.30,OP4 PEG的质量分数w=0.003,双组分引发剂浓度=22.64mmol·L-1,反应温度50℃。共聚物吸液率(水及生理盐水)A为:AH2O　　=1070mL·g-1,Anormalsaline　　　=220mL·g-1,抗电解质能力高于聚丙烯酸钠或丙烯酸钠与丙烯酰胺的共聚物(反相悬浮法合成),140℃以上热稳定性低于聚丙烯酸钠,保水性与其相当。更多还原

【Abstract】 Superabsorbent resins based on AA and AMPS were synthesized by inverse suspension copolymerization , in which APSNa2SO3 as initiator. The preferable conditions are: wAMPS=0.30, cAPSNa2SO3= 22.64 mmol·L 1,cMBAM=1.082 mmol·L 1, the temperature of copolymerization 50 ℃,neutralization degree of AA 80%, wOP4-PEG =0.003. Absorbency of the corresponding resin: Adeionized water=1 070 mL·g 1, Anormal water=220 mL·g 1,and its absorbabilty in normal saline is better than that of PAA or PAAAM(based on inverse suspension polymerization). Thermal stabability of the copolymer was slightly lower than that of poly(sodium acrylate) over 140 ℃, and the pure water retention ability equivalent to the later. Stabilzer concentration , different dispersion media and initiators affected the properties of the copolymer.更多还原