Preparation of monodisperse acrylic acid based polymer microspheres with N, N -methylenebisacrylamide as crosslinker

Polymer microspheres with low degree of crosslinking were prepared with N, ,-methylenebisacrylamide as crosslinker and 2,2-azobisisobutyronitrile as initiator in neat acetonitrile. These micro particles precipitated from the reaction medium through an entropic manner and finally microspheres with narrow size dispersity and with size range 232-332 nm gained without using any stabilizer and surfactants .finally the effect of crosslinking degree on size, size dispersity and morphology of the particles were studied with scanning electron microscopy(SEM).