Mechanism of action of titanium dioxide pigment in the photodegredation of polyvinyl chloride) and other polymers
UNSPECIFIED (2002) Mechanism of action of titanium dioxide pigment in the photodegredation of polyvinyl chloride) and other polymers. PROGRESS IN REACTION KINETICS AND MECHANISM, 26 (4). pp. 337-374. ISSN 1468-6783Full text not available from this repository.
The extensive use of titanium dioxide as a pigment and optical agent in polymers, particularly poly(vinyl chloride), polyethylene and alkyd resins, has prompted many investigations of the various deleterious effects (loss of gloss and mechanical properties, chalking, pinking) of long-term exposure to sunlight of the pigmented polymers. This short review summarises the fundamental semiconductor processes undergone by TiO2 on UV irradiation and the consequent chemical action of the reactive intermediates so generated. It also describes the strategies developed to counteract photodegradation induced by TiO2, in particular its encapsulation in a coating by near-UV transparent metal oxides, such as Al2O3 and SiO2, with wide band gaps. The effects of doping TiO2 with transition metal ions are also noted.
|Item Type:||Journal Article|
|Subjects:||Q Science > QD Chemistry|
|Journal or Publication Title:||PROGRESS IN REACTION KINETICS AND MECHANISM|
|Number of Pages:||38|
|Page Range:||pp. 337-374|
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