Investigation of crosslinker functionality effect on the feature of microgel properties

Precipitation polymerization of acrylic acid in toluene as organic solvent was carried out at 80°C with Trimethylol propane triacrylate (TMPTA), 1,6-hexanediol diacrylate(HDDA) and di(trimethylol propane) tetraacrylate (DTMPTA) as multifunctional crosslinkers and 2,2 - azobis(isobutyronitrile) (AIBN) as initiator. Rotational viscosity in neutralized solution was considerably changed by functionality of crosslinker. Viscosity was increased initially with enhancement of functionality of crosslinker and it was then reduced. Gell content was increased and swelling in ethanol was decreased