Some Aspects of the Thermo-kinetic Non-isothermal Study on the Thermooxidative Degradation of Polytetrafluoroethylene Containing Additives

Some Aspects of the Thermo-kinetic Non-isothermal Study on the Thermooxidative Degradation of Polytetrafluoroethylene Containing Additives

The thermooxidative degradation of polytetrafluoroethylene (PTFE), both pure and containing additives such as: carbon (graphite) (C), bronze (BZ) and glass fibre (GF), has been studied by non-isothermal thermo-differential analysis (DTA). The values of kinetic parameters obtained from the DTA data,...

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Veröffentlicht in:Iranian polymer journal 2003-05, Vol.12 (3), p.165-170
Hauptverfasser: Chiriac, M, Rosu, A, Dumitras, M, Odochian, L
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creator Chiriac, M
Rosu, A
Dumitras, M
Odochian, L
description The thermooxidative degradation of polytetrafluoroethylene (PTFE), both pure and containing additives such as: carbon (graphite) (C), bronze (BZ) and glass fibre (GF), has been studied by non-isothermal thermo-differential analysis (DTA). The values of kinetic parameters obtained from the DTA data, on the basis of thermo-kinetic equations, were compared with the values obtained from the non-isothermal thermogravimetric analysis (TG-DTG) and a good agreement was achieved. The analysis of the characteristic temperatures and of the kinetic parameters from DTA-DTG data revealed that the thermal stability and mechanism of thermooxidative degradation depend on the nature and concentration of additives. The results were confirmed by the existence of a real compensation effect. The following equation was derived for the compensation effect: In A = 0.1410 E - 0.15.
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The values of kinetic parameters obtained from the DTA data, on the basis of thermo-kinetic equations, were compared with the values obtained from the non-isothermal thermogravimetric analysis (TG-DTG) and a good agreement was achieved. The analysis of the characteristic temperatures and of the kinetic parameters from DTA-DTG data revealed that the thermal stability and mechanism of thermooxidative degradation depend on the nature and concentration of additives. The results were confirmed by the existence of a real compensation effect. 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The values of kinetic parameters obtained from the DTA data, on the basis of thermo-kinetic equations, were compared with the values obtained from the non-isothermal thermogravimetric analysis (TG-DTG) and a good agreement was achieved. The analysis of the characteristic temperatures and of the kinetic parameters from DTA-DTG data revealed that the thermal stability and mechanism of thermooxidative degradation depend on the nature and concentration of additives. The results were confirmed by the existence of a real compensation effect. The following equation was derived for the compensation effect: In A = 0.1410 E - 0.15.</abstract><tpages>6</tpages></addata></record>
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title Some Aspects of the Thermo-kinetic Non-isothermal Study on the Thermooxidative Degradation of Polytetrafluoroethylene Containing Additives
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