Molecular characterization of styrene butyl acrylate acrylic acid methacrylamide copolymers prepared by emulsion polymerization using GPC-MALLS

Several samples of polystyrene and copolymer of styrene and butyl acrylate containing methacrylamide and/or acrylic acid synthesized by non-seeded sem i-batch emulsion polymerization were characterized using gel permeation chr omatography coupled with a multi angle laser light scattering photometer (G PC-MALLS). Molecular weight distribution varied with the polymer compositio n. The obtained GPC-MALLS data showed extraordinary GPC behaviour of the pr epared samples. The data hint the presence of branched molecules and microg els in the measured samples.