Thermogravimetric studies of the thermooxidative stability of irradiated and unirradiated polyethylene part I. effect of antioxidant

Autor:	V. Markovic, Lj. Novaković, O. Gal, V. Stannett
Rok vydání:	1983
Předmět:	chemistry.chemical_classification Thermogravimetric analysis Radiation Antioxidant Autoxidation medicine.medical_treatment Polymer Polyethylene chemistry.chemical_compound Low-density polyethylene Polymer degradation chemistry medicine Organic chemistry Thermal stability Nuclear chemistry
Zdroj:	Radiation Physics and Chemistry (1977). 22:627-634
ISSN:	0146-5724
DOI:	10.1016/0146-5724(83)90072-9
Popis:	The addition of antioxidants to polymers increases their thermooxidative stability as indicated by a delay and/or a retardation of degradation. The present paper considers the influence of the nature of the antioxidant (hindered phenols, aromatic amines, and organic compounds containing sulphur atoms) on the thermooxidative behaviour of a low density polyethylene at 200°C. The following characteristics have been measured in polymer samples with zero, 0.1; 0.5; and 1.0 wt% content of antioxidant: the induction time of the oxidation process, rate of autoxidation and rate of polymer degradation (up to about 20% weight loss). The difference in thermal stability in radiation crosslinked material and comparative retardation of the thermooxidative degradation is observed up to a absorbed dose of 200 kGy.
Databáze:	OpenAIRE
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