This paper discusses an effective route in the graft copolymerization of methyl methacrylate monomer onto syndiotactic polystyrene (sPS) using free-radical polymerization, and the effect of an organophilic montmorillonite (O-MMT) on the final properties of the graft copolymer sample. The structure of vinyl-terminated sPS multicenter macromonomer and the graft copolymer were characterized by means of Fourier transform infrared and 1H nuclear magnetic resonance spectroscopy. The exfoliated sPS-graft-poly(methyl methacrylate)/MMT nanocomposite was characterized by means of X-ray diffraction, transmission electron microscopy, thermogravimetric analysis and differential scanning calorimetry.
