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Acrylonitrile-Butadiene-Styrene Copolymers (ABS): Pyrolysis and Combustion Products and Their Toxicity--A Review of the Literature.


pdf icon Acrylonitrile-Butadiene-Styrene Copolymers (ABS): Pyrolysis and Combustion Products and Their Toxicity--A Review of the Literature. (10356 K)
Rutkowski, J. V.; Levin, B. C.

NBSIR 85-3248; 59 p. December 1985.

Fire and Materials, Vol. 10, No. 3-4, 93-105, September-December 1986.

Sponsor:

Consumer Product Safety Commission, Bethesda, MD

Available from:

National Technical Information Service
Order number: PB86-153772

Keywords:

ABS plastics; carbon monoxide; combustion products; hydrogen cyanide; literature reviews; thermal decomposition; toxicity; thermal degradation

Abstract:

A review of the literature was undertaken to ascertain the current knowledge of the nature of the thermal decomposition products generated from ABS and the toxicity of these evolved products intoto. The literature review encompasses English language publications available through June 1984. This literature surveyed showed that the principal ABS thermooxidative degradation products of toxicologic importance are carbon monoxide and hydrogen cyanide. The experimental generation of these and other volatile products is principally dependent upon the combustion conditions and the formulation of the plastic. The toxicity of ABS thermal degradation products has been evaluated by five methods. The LC50 (30 min. exposure + 14 day post exposure period) values for flaming combustion ranged from 15.0 mg/l to 28.5 mg/l. In the non-flaming mode of combustion, the LC50 values ranged from 19.3 mg/l to 64.0 mg/l. Therefore, no apparent toxicological difference exists between the flaming mode and the non-flaming mode. The toxicity of ABS degradation products was found to be comparable to the toxicity of the thermal decomposition products of other common polymeric materials.