Study On Influence Of Surface Properties Of Nano Calcium Carbonate On Its Dispersion Morphology In Polystyrene Matrix

On the paper, physico-chemical properties of nano calcium carbonate surface were tested with inverse gas chromatography (IGC) and character parameters of nano calcium carbonate agglomerate (including cohesive force and internal friction coefficient between particles) were tested by direct shear experiment, and influence of surface coating technology on surface physico-chemical properties and character parameters of nano calcium carbonate agglomerate were studied Polystyrene/nano calcium carbonate composite was prepared with melt dispersion technology. The morphology of nano calcium carbonate dispersed in polystyrene matrix was investigated with particle size analyzer and transparent electronic microscope (TEM). The results indicated that adsorption free energy and dispersive component of the surface free energy of nano calcium carbonate were decreased with adsorbing titanate coupling agent (NDZ-101) on the surface of nano calcium carbonate, the adsorption free energy and dispersive component of the surface free energy of nano calcium carbonate treated with about 3%(by weight of nano calcium carbonate) titanate coupling agent (NDZ-101) were lowest. The results of particle size analysis showed that particle size of nano calcium carbonate dispersed in polystyrene matrix was smallest, the nano calcium carbonate was treated with 3%(by weight of nano calcium carbonate) titanate coupling agent (NDZ-101), the character size of these nano calcium carbonate dispersed in polystyrene matrix was 196nm. Character parameters of nano calcium carbonate agglomerate (including cohesive force and internal friction coefficient between particles) were changed by treated with surface treatment. Morphology of nano calcium carbonate dispersed in polystyrene matrix was markedly influenced by the character parameters of nano calcium carbonate agglomerate.