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Studies of diffusion in polymers by ultraviolet microscopy—I. Diffusion of stabilizing additives in polypropylene

✍ Scribed by N.C. Billingham; P.D. Calvert; A. Uzuner

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
632 KB
Volume
25
Category
Article
ISSN
0014-3057

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✦ Synopsis

Diffusion coefficients of u.v. absorbing stabilizers in polypropylene can be measured by using u.v. microscopy to reveal the concentration profile of the additive in a thin polymer film over diffusion distances of as little as 50 #m. The method is more rapid than conventional methods and is illustrated by studies of a homologous series of alkyl-substituted benzophenones. Comparison with existing data shows the method to be reliable and allows some existing discrepancies to be resolved.

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