Influence of TiO₂ on the photostability and photocatalysis of PVC

The action mechanisms and research advances of both commercial and nano-TiO₂ (rutile and anatase) in the photostability and photocatalysis of polyvinyl chloride) (PVC) were reviewed in this paper. At the same time, the photostable and photocatalytic performance of TiO₂ modified by doped and coated were summarized. The rutile form has an excellent stabilizing effect on photodegradation whereas anatase form has a photocatalytic effect on the photodegradation of PVC. The greatest protection to PVC is offered by TiO₂ (rutile) particles coated with inorganic compounds. The photocatalytic performance of TiO₂ (anatase) to polymer is improved by surface modification with organic compounds, which can improve the dispersion of pigment. The photodegradation rate of PVC is changed by doped with a range of transition metal ions, which can import the defect positions in crystal lattice or change crystallinity.