Abstract
AbstractPoly(o‐acetylstyrene) (POAS) films were exposed under vacuum conditions to long wave ultraviolet radiation (λ ≥ 300 nm). Gaseous products, determined quantitatively by mass spectrometry, were methane, ethane and CO (trace), their formation indicating that POAS was undergoing Norrish Type I photodecompositions. Quantum yields for CH4 and C2H6 formation were more than an order of magnitude lower than the corresponding values for the isomeric poly(vinylacetophenone) (PVAP). Transient spectral measurements at 390 nm indicate the presence of enols (syn and anti), which result from the photoenolization of the ketone. Lifetimes are 161 and 4500 ns, respectively. The polymer undergoes crosslinking, the rate being much lower than that of PVAP. The mechanisms of the reactions are discussed, and it is proposed that the photostability of POAS (relative to PVAP) is the result of photoenolization, which competes favourably with degradation. POAS has considerable potential in sunlight storage applications.
Sign-in/Register to access full text options 
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 callMore From: Journal of Polymer Science Part A: Polymer Chemistry
Disclaimer: 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.
