Synthesis of poly(N,N-dimethylacrylamide)/silica gel polymer hybrids by in situ polymerization method

Abstract

As a novel synthetic method for organic-inorganic polymer hybrids, in situ radical polymerization of vinyl monomers in sol-gel reaction of alkoxysilanes was investigated. N,N-Dimethylacrylamide (DMAAm) was polymerized simultaneously with hydrolysis and condensation of tetramethoxysilane (TMOS) to afford homogeneous poly(N,N-dimethylacrylamide) (PDMAAm) and silica gel polymer hybrids. Conversion of the monomer was supported by TGA, GPC and 1H, 13C NMR, which was found to have high value. It was made clear from nitrogen porosimetry study that homogeneity of the hybrids depends on the amount of acid catalyst and gelation degree of silica gels.