Absorption changes under UV illumination in doped PMMA |
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| Authors: | F. Havermeyer C. Pruner R.A. Rupp D.W. Schubert E. Krätzig |
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| Affiliation: | (1) University of Osnabrück, 49069 Osnabrück, Germany, DE;(2) University of Vienna, 1090 Wien, Austria, AT;(3) GKSS Research Centre, 21502 Geesthacht, Germany, DE |
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| Abstract: | The absorption spectra of poly(methyl methacrylate) (PMMA) doped with the photoinitiator 2,2-dimethoxy-2-phenylacetophenone (DMPA) change under illumination with UV light. Time-resolved measurements of the kinetics of the absorption changes at 352 nm prove the existence of a second light-induced reaction besides the expected light-induced decay of the photoinitiator. We propose a model for this second process which is in good agreement with the observed experimental facts. Received: 17 July 2000 / Published online: 5 October 2000 |
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| Keywords: | PACS: 82.50 42.70.Ln |
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