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Effect of UV-irradiation on fluorescence of poly(methyl methacrylate) films with photosensitive organic compounds

Paper ID Volume ID Publish Year Pages File Format Full-Text
25829 43886 2016 7 PDF Available
Title
Effect of UV-irradiation on fluorescence of poly(methyl methacrylate) films with photosensitive organic compounds
Abstract

•Films of neat poly(methyl methacrylate) and with three photoactive compounds (photoinitiators) were prepared.•Influence of UV light on fluorescence of the photoinitiators and poly(methyl methacrylate) with theses compounds was studied.•Photoinitiators undergo decomposition under UV irradiation but in polymer matrix this process is low efficient due to energy transfer processes.•Fluorescence properties of poly(methyl methacrylate) were improved by introduction of photosensitive compounds.

The simple way of physical modification of poly(methyl methacrylate) (PMMA) for the purpose of formation its photoactivity and fluorescence properties has been described. It was found that aromatic carbonyl compounds (2,2-dimetoxy-2-phenylaceto-phenone, benzoyl peroxide and tert-butyl peroxybenzoate) dispersed in PMMA matrix changed its optical properties, which was studied by absorption and emission spectroscopy. Modified PMMA exhibits fluorescence upon excitation of 220 or 270 nm. The intensity of emission band decreases after samples exposure to short wavelength UV-irradiation, which is evidence of component photolysis. The fluorescence decay is slightly smaller for the irradiated initiators in PMMA matrix, but the trend is similar to that for pure initiators exposed to UV. The protective effect of PMMA on the studied compounds after UV-irradiation, however, is accompanied by photodegradation reactions occurring in the polymer, which was confirmed by viscometric measurements.

Keywords
Poly(methyl methacrylate); Photoinitiators; Fluorescence spectroscopy; UV–vis spectroscopy
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Effect of UV-irradiation on fluorescence of poly(methyl methacrylate) films with photosensitive organic compounds
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Photochemistry and Photobiology A: Chemistry - Volumes 319–320, 15 March–15 April 2016, Pages 18–24
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us