摘要
The kinetics of acrylamide polymerization in inverse microemulsions composed of octane/Span 80-Tween 60/acrylamide/water was studied.For most of the systems investigated, the polymerization performed very fast and monomer conversion to polymer achieved over 90% in 30 min . After reaching maximum at conversion near 20% polymerization rate decreased rapidly. The interval of constant rate was not observed.The influence of monomer concentration, initiator concentration, emulsifier concentration, sodium acetate concentration and reaction temperature on polymerization rate at 5% conversion(Rp,5%),maximal rate(Rp,max), and relative molecular mass of polymers was researched, and the following relations were obtained:Rp,5%∝1.020.45-0.34Rp,max∝0.940.45-0.37Mv∝1.19-0.11-1.19 Apparent active energies of polymerization were 74.4 kJ/mol and 79.5 kJ/mol for Rp,5% and Rp,max, respectively.
The kinetics of acrylamide polymerization in inverse microemulsions composed of octane/Span 80-Tween 60/acrylamide/water was studied.For most of the systems investigated, the polymerization performed very fast and monomer conversion to polymer achieved over 90% in 30 min . After reaching maximum at conversion near 20% polymerization rate decreased rapidly. The interval of constant rate was not observed.The influence of monomer concentration, initiator concentration, emulsifier concentration, sodium acetate concentration and reaction temperature on polymerization rate at 5% conversion(Rp,5%),maximal rate(Rp,max), and relative molecular mass of polymers was researched, and the following relations were obtained:Rp,5%∝1.020.45-0.34Rp,max∝0.940.45-0.37Mv∝1.19-0.11-1.19 Apparent active energies of polymerization were 74.4 kJ/mol and 79.5 kJ/mol for Rp,5% and Rp,max, respectively.
出处
《合成橡胶工业》
CAS
CSCD
1999年第4期220-224,共5页
China Synthetic Rubber Industry
关键词
丙烯酰胺
微乳液聚合
引发剂
乳化剂
聚合
辛烷
acrylamide
microemulsion polymerization
initiator
emulsifier
polymerization kinetics
