Summary
A low temperature ESR technique has been developed for the observation of free radical intermediates generated in clear polymer films during photolysis by UV light under nitrogen. The technique is simple and reproducible, and can be used for polymers having glass transition temperatures at or about room temperature without the need to employ spin traps. The generation of free radicals can be monitored and quantified during exposure, and the radical yields obtained can then be correlated with the chemical structure of the polymer to provide a rapid predictive evaluation of the exterior durability of the polymer.
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Binns, M.R., Lukey, C.A., Hill, D.J.T. et al. A new technique for the study of reactive species generated during the initial stages of polymer photodegradation. Polymer Bulletin 27, 421–424 (1992). https://doi.org/10.1007/BF00309699
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DOI: https://doi.org/10.1007/BF00309699