UV-light-induced curing of branched epoxy novolac resin for coatings
UV-light induced curing of the branched epoxy novolac resin (ENR) is reported. Cross-linked ENR coatings with a thickness of 150 µm were produced by the cationic photopolymerization of poly((phenyl glycidyl ether)-co-formaldehyde), which was photoinitiated by bis(4-dodecylphenyl)-iodonium hexafluror...
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| Format: | Article |
| Language: | English |
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Budapest University of Technology and Economics
2018-10-01
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| Series: | eXPRESS Polymer Letters |
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| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0009149&mi=cd |
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| author | S. Gaidukovs A. Medvids P. Onufrijevs L. Grase |
| author_facet | S. Gaidukovs A. Medvids P. Onufrijevs L. Grase |
| author_sort | S. Gaidukovs |
| collection | DOAJ |
| description | UV-light induced curing of the branched epoxy novolac resin (ENR) is reported. Cross-linked ENR coatings with a thickness of 150 µm were produced by the cationic photopolymerization of poly((phenyl glycidyl ether)-co-formaldehyde), which was photoinitiated by bis(4-dodecylphenyl)-iodonium hexaflurorantimonate. ENR crosslinking efficiency of UVlight polymerization accomplished by Hg-lamp with a power of 1 kW continuous irradiation was investigated as a function of the photoinitiator content and UV curing time. Optimal cross-linking properties were observed for photoinitiator concentration of 1.5%, and curing time 5 min. It was found that higher Vickers hardness of the polymer resulted in an increased cross-linking density of the developed chain network. UV irradiation time longer than 6 min results in the photodegradation of the polymer. This was confirmed by scanning electron microscopy investigations of polymer surface microstructure, as well as complemented by Fourier transform infrared (FTIR), ultraviolet-visible (UV-VIS) and Raman spectroscopy measurements that evidence the oxygen containing groups. Furthermore, the developed ENR photopolymerization technology can be used to obtain protective coatings for applications in power generation and maritime industries where thermal curing processes and two-component resin hardening are unacceptable. |
| format | Article |
| id | doaj-art-e5a056f4bfd745648d0f5dbb5a5e5c66 |
| institution | Kabale University |
| issn | 1788-618X |
| language | English |
| publishDate | 2018-10-01 |
| publisher | Budapest University of Technology and Economics |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj-art-e5a056f4bfd745648d0f5dbb5a5e5c662025-08-20T03:57:59ZengBudapest University of Technology and EconomicseXPRESS Polymer Letters1788-618X2018-10-01121091892910.3144/expresspolymlett.2018.78UV-light-induced curing of branched epoxy novolac resin for coatingsS. GaidukovsA. MedvidsP. OnufrijevsL. GraseUV-light induced curing of the branched epoxy novolac resin (ENR) is reported. Cross-linked ENR coatings with a thickness of 150 µm were produced by the cationic photopolymerization of poly((phenyl glycidyl ether)-co-formaldehyde), which was photoinitiated by bis(4-dodecylphenyl)-iodonium hexaflurorantimonate. ENR crosslinking efficiency of UVlight polymerization accomplished by Hg-lamp with a power of 1 kW continuous irradiation was investigated as a function of the photoinitiator content and UV curing time. Optimal cross-linking properties were observed for photoinitiator concentration of 1.5%, and curing time 5 min. It was found that higher Vickers hardness of the polymer resulted in an increased cross-linking density of the developed chain network. UV irradiation time longer than 6 min results in the photodegradation of the polymer. This was confirmed by scanning electron microscopy investigations of polymer surface microstructure, as well as complemented by Fourier transform infrared (FTIR), ultraviolet-visible (UV-VIS) and Raman spectroscopy measurements that evidence the oxygen containing groups. Furthermore, the developed ENR photopolymerization technology can be used to obtain protective coatings for applications in power generation and maritime industries where thermal curing processes and two-component resin hardening are unacceptable.http://www.expresspolymlett.com/letolt.php?file=EPL-0009149&mi=cdCoatingsPhotopolymerizationbranched epoxy novolac resinUV curing |
| spellingShingle | S. Gaidukovs A. Medvids P. Onufrijevs L. Grase UV-light-induced curing of branched epoxy novolac resin for coatings eXPRESS Polymer Letters Coatings Photopolymerization branched epoxy novolac resin UV curing |
| title | UV-light-induced curing of branched epoxy novolac resin for coatings |
| title_full | UV-light-induced curing of branched epoxy novolac resin for coatings |
| title_fullStr | UV-light-induced curing of branched epoxy novolac resin for coatings |
| title_full_unstemmed | UV-light-induced curing of branched epoxy novolac resin for coatings |
| title_short | UV-light-induced curing of branched epoxy novolac resin for coatings |
| title_sort | uv light induced curing of branched epoxy novolac resin for coatings |
| topic | Coatings Photopolymerization branched epoxy novolac resin UV curing |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0009149&mi=cd |
| work_keys_str_mv | AT sgaidukovs uvlightinducedcuringofbranchedepoxynovolacresinforcoatings AT amedvids uvlightinducedcuringofbranchedepoxynovolacresinforcoatings AT ponufrijevs uvlightinducedcuringofbranchedepoxynovolacresinforcoatings AT lgrase uvlightinducedcuringofbranchedepoxynovolacresinforcoatings |