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| Constant Temperature Curing Reaction of Epoxy Coating Based on Multi-channel In-situ Infrared Spectroscopy |
| Received:January 04, 2023 Revised:March 24, 2023 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2023.07.005 |
| KeyWord:epoxy resin coating curing mechanism multi-channel in situ infrared spectroscopy chemical structure curing reaction kinetics |
| Author | Institution |
| XU Chun |
State Key Laboratory of Environment-friendly Energy Material, Southwest University of Science and Technology, Sichuan Mianyang , China;Institute of Chemical Materials, China Academy of Engineering Physics, Sichuan Mianyang , China |
| LIANG Shu-en |
Institute of Chemical Materials, China Academy of Engineering Physics, Sichuan Mianyang , China |
| LIN Nan-nan |
Institute of Chemical Materials, China Academy of Engineering Physics, Sichuan Mianyang , China |
| HAO Xiao-fei |
Institute of Chemical Materials, China Academy of Engineering Physics, Sichuan Mianyang , China |
| LIU Zhong-ping |
Institute of Chemical Materials, China Academy of Engineering Physics, Sichuan Mianyang , China |
| JIN Bo |
State Key Laboratory of Environment-friendly Energy Material, Southwest University of Science and Technology, Sichuan Mianyang , China |
| SUN Jie |
Institute of Chemical Materials, China Academy of Engineering Physics, Sichuan Mianyang , China |
| SUI He-liang |
Institute of Chemical Materials, China Academy of Engineering Physics, Sichuan Mianyang , China |
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| Abstract: |
| The work aims to expand the application of multi-channel in-situ infrared spectroscopy and investigate the molecular structure change of epoxy resin in curing behavior and the kinetic parameters and constant temperature curing model at different curing depths. Multi-channel in-situ infrared spectroscopy was used to characterize the curing process of the epoxy coating of N, N, O-glycidyl p-aminophenol (epoxy resin AFG-90) and methyl nadic anhydride (MNA) at five temperatures of 30, 40, 50, 60 and 70 ℃. The isothermal curing model was studied based on the change of characteristic functional group absorbance. Through the relationship between the absorbance of the characteristic functional group and the temperature and time, the curing model of the epoxy resin curing system of AFG-90 and MNA at different temperatures and the curing time at different curing degrees were calculated. The activation energy Ea at different curing depths was mainly between 58-74 kJ/mol, and the average value was 69.43 kJ/mol. The kinetic parameters and models of the epoxy resin curing system of AFG-90 and MNA during the curing process are obtained. At the same time, the experimental results show that multi-channel in-situ infrared spectroscopy is an effective characterization method for studying the curing reaction kinetics of polymer materials. |
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