反相悬浮聚合分散剂的合成及性能

Synthesis of Inverse Suspending Agents for Acrylate Polymerization

聚丙烯酸（钠）的吸水速度快，吸水量大，通常在有机介质环己烷、戊烷、（甲基）环戊烷中进行反相乳液聚合法生产，但一般只能获得颗粒细小的粉末状树脂，在介质中沉降速度慢，工程上易起粉尘危害．吸水树脂颗粒细小也影响树脂性能［１］，采用反相悬浮聚合法合成聚丙烯酸...

Two copolymers(S 1, S 2) were prepared from styrene with N vinylpyrrolidone and N,N diethylacrylamide respectively. The partly neutralized acrylate(sodium) was polymerized in cyclohexane by using the copolymers as an inverse suspending agent. When S 1 meeted 8%< F 2W <20% and 1 2×10 4< M <7 5×10 4 the polyacrylate obtained had a particle size of 0 3～2 6 mm and a high water absorption ability. Using S 2 as suspending agent the particle size of polyacrylate was ca. 1 mm. The copolymers have the advantages of improving the particle size of polyarylate and a little adhesion to reactor.