Coloring of compound based on polypropylene/talc using titan dioxide: The effect of titan dioxide particle size in nano and micro

In this study particulate composite based on polypropylene/ talc containing different amount of titan dioxide were produced. Titan dioxides powders were incorporated in nano and micro size. The effect of micro and nano size of titan dioxide were studied via mechanical (tensile and impact properties) and color matching tests. The samples were obtained using a co-rotating twin screw extruder. The results showed that the presence of titan dioxide has not considerable effect on melt flow index of the samples in both sizes. However, the different meaningful results were obtained in mechanical and optical testes due to different size (micro and nano) for the samples. The samples containing nano size titan dioxide showed better mechanical and optical test due to higher surface/volume ratio.