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Ultraviolet irradiation of plastics III. Decomposition products and mechanisms

✍ Scribed by Stephenson, C. V. ;Lacey, J. C. ;Wilcox, W. S.

Book ID
104531978
Publisher
John Wiley and Sons
Year
1961
Weight
473 KB
Volume
55
Category
Article
ISSN
0022-3832

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✦ Synopsis

Abstract

Volatile decomposition products of ultraviolet‐irradiated polyethylene, nylon, Mylar, and Acrilan have been analyzed. The principal decomposition products of polyethylene are hydrogen and methane. Besides hydrogen and methane, carbon monoxide occurs in considerable amounts in the decomposition products of the other polymers. There is a considerable difference in the relative abundances of methane and hydrogen in the decomposition products, depending on whether irradiation was performed in a vacuum or in nitrogen. Decomposition products of ultraviolet‐irradiated nylon include all of the primary amines from methyl through hexyl. Mechanisms consistent with the observed results of photolysis are proposed.

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