styrene blends. Viscosity, storage modulus and loss modulus of acrylonitrile butadiene styrene was larger than polyamide 6 through all frequency ranges and it was decreased with adding polyamide 6. Comparison between complex viscosities of blends with additive rule showed a negative deviation of additive rule in all compositions, this deviation in processing conditions implies to interlayer slippage behavior in the components interface which show emulsionlike behavior is prominent. Increasing elasticity of rich polyamide 6 blends is more pronounced than rich acrylonitrile butadiene styrene blends. Because polyamide 6 get more orientatio than acrylonitrile butadiene styrene due to shear rate. Interfacial tension of acrylonitrile butadiene styrene/polyamide 6 was calculated in accordance to harmonic equation. Then rheological behavior of the blend was fitted to some rheological models. Fitting to Palierne model was good for polyamide 6 rich blend(containing 75% wt PA6), but not for acrylonitrile butadiene styrene rich blend(containing 75wt % ABS). Because Palierne model doesn’t predict yield stress of ABS. Also complex modulus of the blends was fitted to Zener model. This fitting was done for all blends and had good results especially for polyamide 6 rich blends through all frequency range. So a unique model was obtained for this blend gets complex modulus of blends just versus frequency and component percentage without requiring any unknown parameter. Morphology studies shows blend with 50wt % polyamide 6 have cocontinuous morphology and other compositions have dispersed-matrix structure. Dispersed phase particles size was predicted by Teilor model, and it was in good agreement with morphological results. In the second part of this study heat resistance and flammability of polyamide 6 75wt % and polyamide 6 25wt % was compared to their nanocomposites having 3wt % nanoclay. The results showed heat resistance of nanocomposites improved in comparison by neat blends. Especially this improvement is more pronounced for polyamide 6 25wt% nanocomposite. Because this nanocomposite have more acrylonitrile butadiene content than polyamide 6 75wt%, and acrylonitrile butadiene styrene which have less heat resistance than polyamide 6 improved more than polyamide 6 by adding nanoclay. But flammability of nanocomposites doesn’t improve much with adding nanoclay, and just combustion behavior was changed.
