KPS引发苯乙烯/丙烯酸丁酯微乳液共聚合的研究

Study on Microemulsion Copolymerization of Styrene and Butyl Acrylate Initiated by Potassium Persulfate

以十二烷基硫酸钠(SDS)/十二烷基苯磺酸钠(SDBS)为乳化剂,水溶性的过硫酸钾(KPS)为引发剂,进行苯乙烯(St)/丙烯酸丁酯(BA)微乳液共聚合反应。研究了单体浓度c(M)、引发剂浓度c(I)、乳化剂浓度c(E)、聚合温度T对St/BA微乳液共聚合反应的最大聚合速率Rmax和聚合物粘均分子量Mη的影响,测定了共聚单体的竞聚率,结果得到:Rmax∝c(I)0.15c(M)1.60c(E)-0.79·e-6549/T,Mη∝c(I)-0.31c(M)0.47c(E)-0.47e2970/T;r(St)=3.93,r(BA)=0.28。

Styrene/butyl acrylate(St/BA) microemulsion copolymerization has been carried out with sodium dodecyl sulfate and sodium dodecyl benzene sulfonate as emulsifier, water soluble potassium persulfate(KPS) as initiator. The effects of initiator concentration(c(I)), total monomer concentration(c(M)), total emulsifier concentration(c(E)) and copolymerization temperature(T) on maximal polymerization rate(R_(max)) and copolymer viscosity-average molecular weight((M_η)) are investigated, and the reactivity ratioes of styrene and butyl acrylate determined.The results are as followed: R_(max) ∝c(I)^(0.15)c(M)^(1.60)c(E)^(-0.79)e^(-6549/T),(M_η)∝c(I)^(-0.31)c(M)^(0.47)c(E)^(-0.47) e^(2970/T);r((St))=3.93;r((BA))=0.28。