Analytical, occupational and toxicologic aspects of the degradation products of polypropylene plastics

Thermooxidative degradation of polypropylene (PP) at close to the industrial processing temperatures was studied with thermogravimetric analysis, infrared spectroscopy, and gas chromatography-mass spectrometry (GC-MS). GC-MS allowed identification of 47 volatile degradation products. Formaldehyde, a...

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Bibliographic Details
Published in:Scandinavian journal of work, environment & health environment & health, 1984-06, Vol.10 (3), p.163-169
Main Authors: Frostling, Harald, Hoff, Ariel, Jacobsson, Sven, Pfäffli, Pirkko, Vainiotalo, Sinikka, Zitting, Antti
Format: Article
Language:English
Subjects:
Aerosols
Air Pollutants, Occupational - analysis
Air Pollutants, Occupational - toxicity
Animals
Antioxidants
Free radicals
Fumes
Gas Chromatography-Mass Spectrometry
Male
Oxidation
Plastics - analysis
Polyethylenes
Polymers
Polypropylenes - analysis
Polypropylenes - metabolism
Polypropylenes - toxicity
Process engineering
Rats
Rats, Inbred Strains
Spectrophotometry, Infrared
Thermogravimetry
Toxicology
Welding
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Summary:Thermooxidative degradation of polypropylene (PP) at close to the industrial processing temperatures was studied with thermogravimetric analysis, infrared spectroscopy, and gas chromatography-mass spectrometry (GC-MS). GC-MS allowed identification of 47 volatile degradation products. Formaldehyde, acetaldehyde, á-methylacrolein, acetic acid, and acetone were the major products. Antioxidants markedly slowed down the degradation of polypropylene and the evolution of the degradation products. The relative amounts of the oxidized products were mostly independent of the degradation temperature or the type of antioxidant. Measurements in the plastics industry revealed low airborne concentrations of individual volatile products. The concentration of aerosols, which infrared analysis showed to resemble paraffin fumes, was significant and probably the most important hygienic hazard. The biochemical parameters (the consumption of protecting sulfhydryl groups and the effects on foreign compound metabolism) indicated that the degradation products are biologically reactive, affecting the balance of normal metabolism in exposed animals.
ISSN:0355-3140
1795-990X
DOI:10.5271/sjweh.2347