Synthesis and physicochemical properties of the new glycidyl methacrylate, styrene, and bis[4(2-hydroxy-3-methacryloyloxypropoxy) phenyl] sulfide terpolymers of different crosslinking degrees are presented. The terpolymers were obtained in the form of regular microspheres by suspension polymerization. The epoxy group content, thermal properties (DSC, thermogravimetric analysis), and swelling characteristic of the functional microspheres were examined. In addition, a selected terpolymer was modified in the epoxide ring opening reaction with diethylenetriamine. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 123: 59-65, 2012