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Determination of diffusion coefficient of oxygen into polymers by using electron spin resonance spectroscopy. I. Poly(methyl methacrylate)
Author(s) -
Kaptan Yilmaz,
Pekcan Önder,
Arca Emin,
Güven Olgun
Publication year - 1989
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1989.070370910
Subject(s) - diffusion , oxygen , analytical chemistry (journal) , methyl methacrylate , radical , polymer , materials science , electron paramagnetic resonance , spectroscopy , effective diffusion coefficient , methacrylate , spin diffusion , chemistry , nuclear magnetic resonance , polymer chemistry , thermodynamics , copolymer , organic chemistry , physics , composite material , medicine , radiology , quantum mechanics , magnetic resonance imaging
A simple technique has been proposed for the measurement of the diffusion coefficient of oxygen into polymeric spheres. The technique is based on the scavenging of radicals produced by high energy radiation by oxygen. The diffusion coefficient of oxygen determined for poly(methyl methacrylate) has shown an inverse dependency on the dose received. Diffusion coefficient determined for low doses ( D = 3.4 × 10 −8 cm 2 /s) as well as that determined after extrapolation to zero dose ( D 0 = 3.7 × 10 −8 cm 2 /s) are in excellent agreement with the values reported in the literature.