Abstract

We have investigated the thermal copolymerization of acrylamide and sodium acrylate in nonionic microemulsions. The formation of microemulsions is strongly related to the acrylate content in the comonomer feed due to a salting out effect of the ethoxylated surfactant. After polymerization, clear and stable inverse latices are formed which contain high solid contents (up to 23%) dispersed in the oil-continuous medium. The dimensions of the particles are rather low (450 Å<d<700 Å) with a narrow distribution. They decrease with increasing emulsifier or sodium acrylate concentrations.Key wordsPoly(acrylamide-co-acrylates)microemulsion polymerizationquasi-elastic light scattering

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