Role of metal oxides in the thermal degradation of poly(vinyl chloride)

Journal Article · Wed Jul 01 00:00:00 EDT 1998 · Industrial and Engineering Chemistry Research

DOI:https://doi.org/10.1021/ie9700167· OSTI ID:655527

Gupta, M C; Viswanath, S G ^[1]

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1. Nagpur Univ. (India)

Thermal degradation of poly(vinyl chloride) has been studied in the presence of metal oxides by a thermogravimetric method. It follows a two-step mechanism. In the first step chlorine free radical is formed as in the case of pure PVC, and in the second step chlorine free radical replaces oxygen from metal oxide to form metal chloride and oxygen free radical. Subsequently, the oxygen free radical abstracts hydrogen from PVC. Formation of metal chloride is the rate-controlling step. The metal chlorides formed during the thermal degradation either volatilize or decompose simultaneously to lower metallic chlorides depending on the boiling point or the volatilization temperature.

• OSTI ID: 655527
• Journal Information: Industrial and Engineering Chemistry Research, Vol. 37, Issue 7; Other Information: PBD: Jul 1998
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
PVC
THERMAL DEGRADATION
CHEMICAL REACTION KINETICS
OXIDES
CATALYTIC EFFECTS
DEHYDROGENATION