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Kinetics of the thermal decomposition mechanisms of conducting and non-conducting epoxy/Al composites
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نویسنده
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arshad m.a. ,maaroufi a. ,benavente r. ,pinto g.
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منبع
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journal of materials and environmental science - 2014 - دوره : 5 - شماره : 5 - صفحه:1342 -1354
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چکیده
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This article reports a kinetic study of the thermal degradation of insulating/conducting epoxy/al composites,in order to obtain their mechanistic information. a comparison of thermo-analytical data obtained from epoxy/al composites with pure epoxy under non-isothermal conditions,showed that aluminum affects the thermal behavior of epoxy complexly and the produced effect depends on the quantity of aluminum in epoxy. the influence of aluminum contents on the thermal degradation of epoxy was fairly explained on the basis of variations in catalytic activity and heat capacity of aluminum with temperature. different differential and integral isoconversional methods were used to determine the activation energies and consequently the appropriate reaction model for the processes,which was found to be šestâk-berggren. kinetic modeling satisfactorily simulated the thermal degradation rates of epoxy/al composites in terms of their kinetic equations and suggested the possibility of weak interactions between epoxy and aluminum. the mechanistic information obtained by kinetic study was found in good agreement with sem and xrd results.
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کلیدواژه
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Aluminum; Epoxy composites; Kinetics; Thermal degradation; Thermogravimetric analysis
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آدرس
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university of mohammed v agdal,laboratory of composite materials,polymers and environment,department of chemistry,faculty of sciences,avenue ibn batouta,p.o.b. 1014, Morocco, university of mohammed v agdal,laboratory of composite materials,polymers and environment,department of chemistry,faculty of sciences,avenue ibn batouta,p.o.b. 1014, Morocco, instituto de ciencia y tecnología de polímeros (csic),juan de la cierva,3, Spain, departamento de ingeniería química industrial y del medio ambiente,e.t.s.i. industriales,universidad politécnica de madrid, Spain
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Authors
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