Oxygen diffusion in poly(methyl methacrylate) at low temperatures

被引:0
|
作者
Korolev, VV [1 ]
Mamaev, AL [1 ]
Bol'shakov, BV [1 ]
Bazhin, NM [1 ]
机构
[1] Novosibirsk Chem Kinet & Combust Inst, Novosibirsk 630090, Russia
关键词
geminate pair; luminescence quenching; diffusion coefficient;
D O I
10.1002/(SICI)1099-0488(19980115)36:1<127::AID-POLB14>3.3.CO;2-X
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
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. (C) 1998 John Wiley & Sons, Inc.
引用
收藏
页码:127 / 131
页数:5
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