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Effect of volatilization of stabilizers and oxidation products on polypropylene lifetimes

✍ Scribed by M. Blumberg; C. R. Boss; J. C. W. Chien

Publisher
John Wiley and Sons
Year
1965
Tongue
English
Weight
373 KB
Volume
9
Category
Article
ISSN
0021-8995

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✦ Synopsis

Three methods of measuring thermal oxidative stability of polypropylene have been compared. The oxygen absorption and the sealed tube tests give comparable results. The polymer lifetimes in circulating oven-aging tests ditrer significantly from those obtained by the first two methods. The oven-aging lifetime is apparently influenced to a large extent by the volatilization of the added stabilizer and of the oxidation products, the former decreases whereas the latter increasw the polymer lifetime. The optimum composition of a synergistic stabilizer system was found to vary with the test method.

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