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Title
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Non-isothermal degradation kinetics of MMA-St copolymer and EPS lost foams
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Type
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JournalPaper
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Keywords
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Lost foam MMA-St copolymer EPS Degradation kinetics
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Abstract
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Methylmethacrylate-styrene (MMA-St) random copolymerwas synthesized by suspension copolymerization. The thermal degradation of MMA-St copolymer and EPS lost foams was studied by non-isothermal thermal gravimetric analysis under nitrogen purge. Thermal decomposition behavior of MMA-St copolymer lost foam was examined and compared with EPS. It was found that EPS foam starts to decompose at higher temperatures than MMA-St copolymer foam in all heating rates. The apparent activation energy was calculated by the Flynn-Wall-Ozawa method. It has been concluded that the model fitting methods unable to reveal the complexity of the pyrolysis process and the model-free methods can be suggested as a reliable way of determining the kinetic parameters.
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Researchers
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(Fifth Researcher), Ali charchi (Fourth Researcher), Farhang Abbasi (Third Researcher), (Second Researcher), Hamid Reza Azimi (First Researcher)
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