On oxygen diffusion in poly(methyl methacrylate) films

被引：12
|
作者：
Vyazovkin, VL [1 ]
Korolev, VV [1 ]
Syutkin, VM [1 ]
Tolkatchev, VA [1 ]
机构：
[1] Russian Acad Sci, Inst Chem Kinet & Combust, Novosibirsk 630090, Russia
来源：
REACTION KINETICS AND CATALYSIS LETTERS | 2002年 / 77卷 / 02期
基金：
俄罗斯基础研究基金会;
关键词：
poly(methyl methacrylate); radical oxidation; luminescence quenching; oxygen diffusion; low temperatures;
D O I：
10.1023/A:1020883818258
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
ESR spectroscopy has been used to follow the kinetics of decay of radicals produced by UV-radiation in PMMA films upon exposure to oxygen in the temperature range 160-210 K. In the same films and at the same conditions, decay kinetics of phenanthrene phosphorescence has been studied at 180-220 K. Both types of the experiments give the same values for diffusion coefficients of oxygen in PMMA. Thus, from the oxygen diffusion standpoint, the sites of the radical stabilization and phenanthrene molecule localization in the polymer matrix do not differ.
引用
收藏
页码：293 / 299
页数：7
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