Low levels of functional acrylic monomers were incorporated into a core-shell acrylic copolymer by seeded emulsion polymerization. The increase in glass transition temperature, T-g, from DSC measurement has showed that although certain amount of crosslinking reactions have Occurred during the polymerization and isolation of the copolymer, the dried copolymer films could undergo further curing by UV irradiation. The structure and amount of the functional monomer, concentration of photoinitiator, and the extent of UV exposure have exerted significant influence oil the 7 of the dry copolymer films. Because of the relatively low level of incorporated unsaturation, there,vas no significant change in FTIR during the curing of the film. Further, crosslinking of the copolymer film induced by UV irradiation has significantly increased the resistance to swelling in alkaline Solution, although the gel content remained the same. (c) 2006 Wiley Periodicals, Inc.