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ELASTOMERS AND PLASTICS Activation Energy of thermal Degradation of Tetrafluoroethylene-Propylene Elastomer

Ein Gastbeitrag von Masayuki Ito, Masahide Nozaki, Tomomi Kosaka, Tokyo, Japan 1 min Lesedauer

The effect of the pre-aging at 250o C before the measurement of thermogravimetry of tetrafluoroethylene-propylene elastomer was studied. The longer the pre-aging time, the more the linearity of the analyzed line with reference to ISO 11358-2 was improved.

Fig.1 Thermal history of the samples at 250oC and the weight retained at the aged time.(Bild:)
Fig.1 Thermal history of the samples at 250oC and the weight retained at the aged time.
(Bild:)

The previous article studied thermogravimetric analysis (TGA) of tetrafluoroethylene-propylene elastomer (TPE) with reference to ISO 11358-2 [1]. Figure 2 in this standard shows the relationship between heating rate versus the reciprocal of the absolute temperature shall be straight line to obtain the activation energy of the polymer. But the previous article found out inflection point on the analyzed line. The region of the higher heating rate and that of the lower heating rate showed the different slopes