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Preparation of Core-Corona Type Microgels of Polyacrylamide

Precipitation polymerization of acrylamide (AAm) and acryloyl terminated PEG macromonomer (AtPEGM) was carried out in selective solvents such as alcohol. Fine particles of microgels were obtained according to the mole ratio of AtPEGM and AAm. The particle size of microgels decreased with increasing concentration of AtPEGM and increased with that of AAm. It was found that microgels were stabilized by steric stabilization of AtPEGM and have the morphology of core-corona type with the size distribution of submicron.