R-ATRP of Acrylamide under the Action of Iron Complex System in Inverse Emulsion

Abstract

Reaction of acrylamide in inverse emulsion, adding Fe (EDTA)2-, with ammonium persulfate (APS) to form complex initiation system, Fe (EDTA)2 -is oxidized to Fe (EDTA)-, the control effect of the Fe (EDTA)-in the inverse emulsion polymerization of acrylamide was discussed. The results showed that acrylamide in inverse emulsion polymerization reaction by adding Fe (EDTA)2-, When the complex concentration is 2.8×10-4mol/L, n [(NH4)2S2O8]::n (FeSO4):n (Na2EDTA)=1:1:1.10, the reaction time was 6 hours, the amount of emulsifier is 3%,the reaction temperature is 40°C , The rate of conversion of monomer Increased in linear relationship with molecular weight, the final rate of conversion of monomer was 93.16%;a kinetic curve showed a good linear relationship, the coefficient of linear correlation was 0.997,Therefore, the Fe (EDTA)2 -have dual role firstly as a reducing agent of an oxidation - reduction initiator system and secondly as potential catalyst in reverse atom transfer radical polymerization (RATRP) .