Abstract
Pigments can have significant influences, both favourable and unfavourable, on the light stability of polymer formulations. This paper reviews information on the manifestations of pigment influences on polymer stability and on their underlying causes. It aims to provide some understanding of the complex phenomena, identify possible causes of unfavourable pigment effects on polymer light stability, and provide some direction for improving the light stability of polymer-pigment-stabiliser systems of unfavourable performance. Favourable pigment influences on polymer light stability may be due to screening of harmful radiation, selective absorption of harmful radiation, and deactivation of polymer photoexcited species. Negative influences may be due to initiation of polymer photo-oxidation by photoexcited pigment chromophores, adsorption or chemical transformation of stabilising additives, influence on polymer morphology, or sensitisation of singlet oxygen formation. Pigment-polymer-stabiliser interactions are complex. Much work is needed to understand them better. A special challenge is a better understanding of why some orange, yellow, and red organic pigments exhibit negative influences on pigment light stability.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
