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
来源：
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS | 1998年 / 36卷 / 01期
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.
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页码：127 / 131
页数：5
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