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Oxygen diffusion in poly(methyl methacrylate) at low temperatures

✍ Scribed by V. V. Korolev; A. L. Mamaev; B. V. Bol'shakov; N. M. Bazhin

Publisher: John Wiley and Sons
Year: 1998
Tongue: English
Weight: 115 KB
Volume: 36
Category: Article
ISSN: 0887-6266
DOI: 10.1002/(sici)1099-0488(19980115)36:1<127::aid-polb14>3.0.co;2-e

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✦ Synopsis

Oxygen diffusion in atactic poly(methyl methacrylate) has been studied by anthracene luminescence quenching in geminate pairs anthracene-oxygen at 77-130 K. Analysis of the experimental data shows that the luminescence quenching is well accounted for by a polychromatic model assuming a log-normal diffusion coefficients distribution due to inhomogeneity of polymer structure. Energy activation is equal to 30 { 1 KJ/mol. All diffusion coefficients data in the range 77-300 K demonstrate a good linear Arrhenius law.

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