engleski

Thermooxidative Degradation of Poly(vinyl chloride)/Acrylonitrile-Butadiene-Styrene Blends

The thermal degradation process of poly(vinyl chloride)/acrylonitrile-butadiene-styrene blends (PVC) was investigated by dynamic thermogravimetic analysis in the temperature range 50-650 oC in air. The thermooxidative degradation takes place in three steps. The first step, dehydrochlorination, is the most rapid. The maximal rate of dehydrochlorination for the PVC blends containing up to 20% ABS-modifier is achived at average conversion of 23.5-20.0%. The apparent activation energies and preexponential factors were calculated after the Kissinger method.

PVC/ABS blends; thermooxidative degradation; thermogravimetic curves; kinetic parameters

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