CO2-switchable polystyrene (PS), poly(methyl methacrylate) (PMMA), and poly(butyl methacrylate) (PBMA) latexes were prepared via surfactant-free emulsion polymerization (SFEP) under a CO2 atmosphere, employing N-[3-(dimethylamino) propyl] methacrylamide (DMAPMAm) as a CO2-switchable, water-soluble, and hydrolytically stable comonomer. The conversion of the SFEP of styrene reaches > 95% in less than 5 h. The resulting latexes have near monodisperse particles (PDI >= 0.05), as confirmed by DLS and TEM. The latexes could be destabilized by bubbling nitrogen (N-2) and heating at 65 degrees C for 30 min, and easily redispersed by only bubbling CO2 for a short time without using sonication. (C) 2017 Wiley Periodicals, Inc.