丙烯酰胺氧化-还原引发体系反相乳液聚合

Acrylamide Inverse Emulsion Polymerization Using Redox Initiator

以过硫酸钾和亚硫酸钠为引发剂,Span-80和OP-10为乳化剂,进行了丙烯酰胺的反相乳液聚合研究;对合成产物进行了FT-IR、线粒径分布测试和表征;探讨了反应温度、反应时间、引发剂用量、乳化剂用量以及油相与水相体积比对转化率的影响。研究结果表明,反应温度30℃,反应时间4 h,油水体积比4∶1,引发剂[n(过硫酸钾)∶n(亚硫酸钠)=1∶1]用量为单体质量的0.5%(质量分数),乳化剂[m(OP-10)∶m(Span-80)=1∶1]用量为单体质量的8.0%(质量分数),在此工艺条件下,单体转化率达98.8%,乳胶体积平均粒径112μm。

Inverse emulsion polymerization was investigated using acrylamide as monomer, Span - 80 and OP- 10 as emulsifier,potassium persulfate and sodium sulfite as initiator. The synthetic products were characterized by IR and panicle size distribution. The effects of reation temperature,reaction time,dosage of initiator and emulsifier,and volume ratio of oil phase to aqueos phase on conversion rate of monomer were discussed. The research results indicated that optimum reaction proeess was as follows： reaction temperature 30 ℃, reaction time 4 h, volume ratio of oil phase to aqueous phase 4： 1, the dosages of initiator and emulsifier 0. 5% and 8.0% of monomer mass respectively. Conversion rate of monomers was up to 98. 8% and volume average particle size of the emulsion was 112 μm under above reaction eondition.