By using of organically modified montmorillionite(MTN)

which was prepared by ion exchange between Na+ ion in the clay and palmityltrimethylammonium ion in aqueous medium

MTN-SsPS(sulfonated syndiotactic polystyrene with sulfonation level of 4.13 mol％) and MTN-aPS(atactic polystyrene) intercalation compounds are prepared through solution intercalating and bulk free radical polymerization process

respectively．The intercalation of SsPS or aPS molecular chains with MTN lamellar sheets was demonstrated by the enlargement degree of the interlamellar distance as measured by X-ray diffraction．Then

the novel sPS／PA6／SsPS-H／montmorillonite nanocomposites were prepared through directly melt blending of MTN-SsPS or MTN-aPS with sPS

PA6 and SsPS-H(sulfonation level of 8.65 mol％)．X-ray diffraction and TEM results show that the clay layers are exfoliated into nanoscale layers and randomly dispersed in the polymer matrix．The average nanoscale size ranges from 10 to 60 nm as obtained by statistics computation

which imply that sPS and PA6 molecular chains maybe intercalate between the layers of MTN during melt blending process．The formation of nanocomposites via melt intercalation depends upon the thermodynamic interaction between the polymer chains and the host silicates and the transport of the polymer chains from the bulk melt into the silicates layers．The miscibility of sPS and SsPS-H

together with the specific intermolecular interactions between PA6 and SsPS-H facilitate the sPS and PA6 intercalate between the MTN-SsPS layers

which

in turn

enhance the miscibility between sPS and PA6 in the composites as verified by DMA measurement．In addition

the mechanical testing shows that the properties of the nanocomposites are superior to the pure blend in terms of the strength and modulus without sacrificing their impact strength．