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以苯乙烯（Ｍ１）和Ｎ，Ｎ－二异丙基丙烯酰胺（Ｍ２）为单体，在甲苯溶液中共聚制得一种新的反相悬浮分散剂，并用此分散剂制得具有较大粒径的高吸水性树脂。共聚物的组成由元素分析法和紫外光谱法测定，聚合物的分子量由ＧＰＣ测定。研究了多种因素对聚合物分子量、转化率及特性粘度的影响，并由此得出如下结论：共聚物分子量随引发剂用量的增大而下降，当共聚物的分子量为３万～４万且Ｆ２＞１６％时，分散剂具有较好的稳定性且合成的高吸水性树脂的粒径随Ｆ２的增大而下降。
A new reversed-phase suspension dispersant was prepared by copolymerization of styrene (Ml) and N, N-diisopropylacrylamide (M2) in toluene solution. With this dispersant, Particle size of the water-absorbent resin. The composition of the copolymer is determined by elemental analysis and ultraviolet spectroscopy, and the molecular weight of the polymer is determined by GPC. The effects of various factors on the molecular weight, conversion and intrinsic viscosity of the polymer were investigated. The results showed that the molecular weight of the copolymer decreased with the increase of the initiator dosage. When the molecular weight of the copolymer was 30,000-40,000 And F2> 16%, the dispersant has good stability and the particle size of the synthesized superabsorbent resin decreases with the increase of F2.