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Research Conducted by F. Bauer and Co-Researchers Has Updated Our Knowledge about Correlation Analysis (Photoinitiator-free UV curing and matting of...

July 15, 2014



Research Conducted by F. Bauer and Co-Researchers Has Updated Our Knowledge about Correlation Analysis (Photoinitiator-free UV curing and matting of acrylate-based nanocomposite coatings: Part 3)

By a News Reporter-Staff News Editor at Life Science Weekly -- Current study results on Correlation Analysis have been published. According to news reporting originating from Leipzig, Germany, by NewsRx correspondents, research stated, "Real-time ATR-FTIR studies on radiation curing of acrylate formulations by a monochromatic 172 nm (Xe-2*) excimer lamp and a polychromatic medium pressure mercury arc lamp revealed that under oxygen-free curing conditions photopolymerization reactions take place at high reaction rates even in the absence of a photoinitiator. Due to quantum chemical calculations, the excitation of acrylate molecules by high energy photons (having wavelengths lambda < 267 nm) can generate radicals resulting in the self-initiation of acrylic C=C photopolymerization reactions. 2D correlation analysis of the ATR-FTIR data makes the irradiation time-dependent correlation between acrylic C=C conversion and wavenumber shifts of C=O and C-O-C bonds evident."

Our news editors obtained a quote from the research, "On a pilot-scale VUV/UV lamp set-up, through cure of acrylate-based nanocomposites of about 50 mu m thickness has been performed in the absence of any photoinitiator. Post-curing VUV irradiation of cured acrylate coatings under nitrogen atmosphere resulted in an excitation of C=O groups rather than photodegradation. Radical formation via absorption of high energy photons (having wavelengths lambda < 219 nm) by C=O bonds is assumed yielding a higher network density within thin surface layers via radical recombination reactions. 2D correlation analysis supports the formation of polar C-OH groups generated after H abstraction by center dot C-O center dot biradicals. Consequently, additional crosslinking reactions within surface-near layers take place via C-C bonds between neighboring polymer chains rather than via C-O-C bonds."

According to the news editors, the research concluded: "Thus, VUV matted acrylate coatings show enhanced surface hardness, improved chemical resistance, and hydrophilic properties."

For more information on this research see: Photoinitiator-free UV curing and matting of acrylate-based nanocomposite coatings: Part 3. Progress in Organic Coatings, 2014;77(6):1085-1094. Progress in Organic Coatings can be contacted at: Elsevier Science Sa, PO Box 564, 1001 Lausanne, Switzerland. (Elsevier - www.elsevier.com; Progress in Organic Coatings - www.elsevier.com/wps/product/cws_home/504100)

The news editors report that additional information may be obtained by contacting F. Bauer, Innovat Oberflachentechnol GmbH, D-04318 Leipzig, Germany. Additional authors for this research include U. Decker, S. Naumov and C. Riedel (see also Correlation Analysis).

Keywords for this news article include: Europe, Leipzig, Germany, Acrylates, Acyclic Acids, Machine Learning, Correlation Analysis, Emerging Technologies

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Life Science Weekly


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