Effect of UV radiation on photolysis of epoxy maleate of bisphenol A |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, Jiangsu 224051, China;2. School of Materials Science and Engineering, Changzhou University, Changzhou, Jiangsu 213000 China;1. State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Qianjin Street 2699, Changchun 130012, PR China;2. School of Physics and Engineering, Henan University of Science and Technology, Luoyang 471003, PR China;3. School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116023, PR China;1. Institute of Physical and Organic Chemistry, Southern Federal University, 194/2 Stachka Avenue, Rostov on Don 344090, Russian Federation;2. Southern Scientific Center of Russian Academy of Sciences, 41 Chekhov Street, Rostov on Don 344006, Russian Federation;1. Laboratoire de Photochimie Moléculaire et Macromoléculaire de l’Université de Clermont II- Ensemble Universitaire de Cézeaux, 63177 Aubière Cedex France;2. Lebanese university, Faculty of sciences section V, Nabatieh, Lebanon;3. Laboratory of Materials, Catalysis, Environment and Analytical Methods, Faculty of Sciences I, Lebanese University, Campus Rafic Hariri, Beyrouth, Lebanon;1. Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong;2. Faculty of Engineering, University of Bristol, Bristol, United Kingdom;3. Centre for Composite Materials and Structures, Harbin Institute of Technology, Harbin, China |
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| Abstract: | The behavior of unsaturated polyesteric resin epoxy maleate of bisphenol A (EMBA) to UV was investigated using both infrared (IR) and optical microscopy (OM) techniques. The UV radiation produces important modifications of the EMBA sample. A photodegradation process takes place by a free radical mechanism and involves both photolysis and photodegradation reactions. In the early stage of photolysis, the excitation of the double bonds of EMBA sample takes place with formation of radicals. The radicals, by combination, form some cross-linked structures. These structures undergo secondary reactions with hydroperoxide formation. The splitting of the EMBA chains initiated by hydroperoxide compounds leads to new aromatic and etheric structures, with elimination of both CO and CO2. |
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