Synthesis of high molecular weight polyacrylamide by inverse emulsion polymerization

Polyacrylamide (PAAm) and its copolymers are of important polymeric materials in the oil industry for example drilling fluid and enhanced oil recovery . High molecular weights of these polymers are needed to have optimum efficiency in the above -mentioned applications. high molecular weight polyacrylamide was prepared by inverse emulsion polymerization under various conditions .effect of variables such as stirrer speed and type , temperature, initiator concentration and type, emulsifier concentration and type and continuous phase type on the viscosity-average molecular weight , particle size and its distribution and reaction kinetics were investigated. depending on the reaction conditions , PAAm particles with average particle sizes generally smaller than 200 nm in diameter and viscosity -average molecular weights as high as 8×10 6 g.mol-1were obtained.

کلیدواژه ها:

polyacrylamide nanoparticle ، inverse emulstion polymerizaiton ، high molecular weight ، reaction kinetics.