Simulation of the thermal degradation and curing kinetics of fly ash reinforced diglycidyl ether bisphenol A composite |
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Affiliation: | 1. Department of Plastic Technology, School of Chemical Technology, H B Technical University, Kanpur, 208002, India;2. Department of Chemistry, School of Basic and Applied Sciences, H B Technical University, Kanpur, 208 002, India;3. Department of Chemistry, V S S D College, H B Technical University, Kanpur, 208 002, India |
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Abstract: | Thermogravimetric Analysis (TGA) is concluding expanding applicability in determination of the thermal stability and degradation nature of materials. The present study investigates the thermal degradation behavior and the kinetics of degradation of epoxy mixed with varying percentages of 0, 2.5, 5, and 7.5 wt% fly ash. Thermal stability and degradation behavior of fly ash modified epoxy cast were determined by thermogravimetric analysis. The kinetic parameters of the EF composites were calculated by using Coats–Redfern, Broido and Horowitz–Metzger models under best-fit analysis and further proved by linear regression analysis. The kinetics of thermal degradation was calculated from data scanned at a heating rate of 10 °C/min. The obtained results reveal that kinetic parameters and thermal behavior of EF composites were improved with the reinforcement of fly ash. The cure kinetics of the varying content of fly ash reinforced epoxy cast were also studied by using a nonisothermal differential scanning calorimetric (DSC) technique at four different heating rates 5 °C/min, 10 °C/min, 15 °C/min and 20 °C/min. The curing kinetics of the EF composite was derived from the nonisothermal differential scanning calorimetry (DSC) data with the three Kissinger, Ozawa, and Flynn–Wall–Ozawa models, respectively. |
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Keywords: | Epoxy Fly ash Thermogravimetric analysis (TGA) Coats- redfern equation Degradation kinetics DSC Thermal properties Curing kinetics |
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