This research is divided into 2 parts. The first part is to investigate the clay exfoliation. The living free radical polymerizations are used to modify the surface. The clays are modified by different methods. They are water contents, solvent contents and duration of heat treatments. It is found the solvent play an important rule in the exfoliation of clays. The second part is to investigate the nanoclay polymer composites. The living free radical polymerizations are used to exfoliate the clay. It is found that PS-Clay and ABS-Clay nanocomposites show increase in the tensile strength.