Curing kinetics, mechanism and chemorheological behavior of methanol etherified amino/novolac epoxy systems
The curing kinetics and mechanism of epoxy novolac resin (DEN) and modified epoxy novolac resin (MDEN) with methanol etherified amino resin were studied by means of differential scanning calorimetry (DSC), Fourier transforminfrared (FT-IR) spectroscopy and chemorheological analysis. Their kinetics p...
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| Format: | Article |
| Language: | English |
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Budapest University of Technology and Economics
2014-02-01
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| Series: | eXPRESS Polymer Letters |
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| Online Access: | http://www.expresspolymlett.com/letolt.php?file=EPL-0004763&mi=cd |
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| author | S. F. Zhao G. P. Zhang R. Sun C. P. Wong |
| author_facet | S. F. Zhao G. P. Zhang R. Sun C. P. Wong |
| author_sort | S. F. Zhao |
| collection | DOAJ |
| description | The curing kinetics and mechanism of epoxy novolac resin (DEN) and modified epoxy novolac resin (MDEN) with methanol etherified amino resin were studied by means of differential scanning calorimetry (DSC), Fourier transforminfrared (FT-IR) spectroscopy and chemorheological analysis. Their kinetics parameters and models of the curing were examined utilizing isoconversional methods, Flynn-Wall-Ozawa and Friedman methods. For the DEN mixture, its average activation energy (Ea) was 71.05 kJ/mol and the autocatalytic model was established to describe the curing reaction. The MDEN mixture exhibited three dominant curing processes, termed as reaction 1, reaction 2 and reaction 3; and their Ea were 70.05, 106.55 and 101.91 kJ/mol, respectively. Besides, Ea of reaction 1 was similar to that of DEN mixture, while Ea of reactions 2 and 3 corresponded to that of the etherification reaction between hydroxyl and epoxide group. Moreover, these three dominant reactions were nth order in nature. Furthermore, their curing mechanisms were proposed from the results of DSC and FTIR. The chemorheological behavior was also investigated to obtain better plastics products via optimizing the processing schedules. |
| format | Article |
| id | doaj-art-12d419f01aa244a5a45ae89e8ee3bedc |
| institution | Kabale University |
| issn | 1788-618X |
| language | English |
| publishDate | 2014-02-01 |
| publisher | Budapest University of Technology and Economics |
| record_format | Article |
| series | eXPRESS Polymer Letters |
| spelling | doaj-art-12d419f01aa244a5a45ae89e8ee3bedc2025-08-20T03:32:47ZengBudapest University of Technology and EconomicseXPRESS Polymer Letters1788-618X2014-02-01829510610.3144/expresspolymlett.2014.12Curing kinetics, mechanism and chemorheological behavior of methanol etherified amino/novolac epoxy systemsS. F. ZhaoG. P. ZhangR. SunC. P. WongThe curing kinetics and mechanism of epoxy novolac resin (DEN) and modified epoxy novolac resin (MDEN) with methanol etherified amino resin were studied by means of differential scanning calorimetry (DSC), Fourier transforminfrared (FT-IR) spectroscopy and chemorheological analysis. Their kinetics parameters and models of the curing were examined utilizing isoconversional methods, Flynn-Wall-Ozawa and Friedman methods. For the DEN mixture, its average activation energy (Ea) was 71.05 kJ/mol and the autocatalytic model was established to describe the curing reaction. The MDEN mixture exhibited three dominant curing processes, termed as reaction 1, reaction 2 and reaction 3; and their Ea were 70.05, 106.55 and 101.91 kJ/mol, respectively. Besides, Ea of reaction 1 was similar to that of DEN mixture, while Ea of reactions 2 and 3 corresponded to that of the etherification reaction between hydroxyl and epoxide group. Moreover, these three dominant reactions were nth order in nature. Furthermore, their curing mechanisms were proposed from the results of DSC and FTIR. The chemorheological behavior was also investigated to obtain better plastics products via optimizing the processing schedules.http://www.expresspolymlett.com/letolt.php?file=EPL-0004763&mi=cdRheologyautocatalytic kinetic modelcuring mechanismactivation energy |
| spellingShingle | S. F. Zhao G. P. Zhang R. Sun C. P. Wong Curing kinetics, mechanism and chemorheological behavior of methanol etherified amino/novolac epoxy systems eXPRESS Polymer Letters Rheology autocatalytic kinetic model curing mechanism activation energy |
| title | Curing kinetics, mechanism and chemorheological behavior of methanol etherified amino/novolac epoxy systems |
| title_full | Curing kinetics, mechanism and chemorheological behavior of methanol etherified amino/novolac epoxy systems |
| title_fullStr | Curing kinetics, mechanism and chemorheological behavior of methanol etherified amino/novolac epoxy systems |
| title_full_unstemmed | Curing kinetics, mechanism and chemorheological behavior of methanol etherified amino/novolac epoxy systems |
| title_short | Curing kinetics, mechanism and chemorheological behavior of methanol etherified amino/novolac epoxy systems |
| title_sort | curing kinetics mechanism and chemorheological behavior of methanol etherified amino novolac epoxy systems |
| topic | Rheology autocatalytic kinetic model curing mechanism activation energy |
| url | http://www.expresspolymlett.com/letolt.php?file=EPL-0004763&mi=cd |
| work_keys_str_mv | AT sfzhao curingkineticsmechanismandchemorheologicalbehaviorofmethanoletherifiedaminonovolacepoxysystems AT gpzhang curingkineticsmechanismandchemorheologicalbehaviorofmethanoletherifiedaminonovolacepoxysystems AT rsun curingkineticsmechanismandchemorheologicalbehaviorofmethanoletherifiedaminonovolacepoxysystems AT cpwong curingkineticsmechanismandchemorheologicalbehaviorofmethanoletherifiedaminonovolacepoxysystems |