Studies of diffusion in polymers by ultr
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N.C. Billingham; P.D. Calvert; A. Uzuner
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Article
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1989
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Elsevier Science
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English
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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 illustra