ISSN:
0887-6266
Keywords:
geminate pair
;
luminescence quenching
;
diffusion coefficient
;
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
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. © 1998 John Wiley & Sons, Inc. J Polym Sci B: Polym Phys 36: 127-131, 1998
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
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