Abstract: Organized montmorillonite(O-MMT) was prepared using cetyl trimethyl ammonium bromide(CTAB). With ammonium persulfate as the initiator, Polyacrylonitrile (PAN) was made by in situ polymerization between the layer of O-MMT. The structure of PAN/MMT was characterized by Fourier transformed infrared spectroscopy (FT-IR) and X-ray diffractometry (XRD). Both the flame retardant property and heat resistanct were investigated. FT-IR and XRD indicated that the interlay spacing of MMT has been expanded, which was attributed to the fact that PAN has been intercalated into the layer by in situ polymerization. The LOI of the blend was enhanced from 18% to 22%, which revealed that the flame retardant property has been improved. In addition, the heat resistanct has been improved.

Key words: polyacrylonitrile%montmorillonite%organization%blending