Study on the effect of nano-TiO_2 on UV aging resistance of polypropylene

The nanocomposite of polypropylene(PP)/polypropylene-graft-maleic anhydride(PP-g-MAH)/nano-TiO_2 was prepared by masterbatch compounding method using PP-g-MAH as a masterbatch matrix.The influence of nano-TiO_2 masterbatch on PP′s resistance to UV aging was analyzed by DSC,TEM,polarized light optical microscope(PLM),surface aspects,melting flowing rate(MFR) and mechanical properties,respectively.It was found that the composite PP/ PP-g-MAH/nano-TiO_2 showed better resistance to UV aging than the pure PP,and the dispersion of nano-TiO_2 in PP that was of importance for the PP′ resistance to UV aging could be effectively improved by using masterbatch compounding method.