Abstract
FORD1 has reported that when nylon polymer films are irradiated in the presence of oxygen, a new absorption band develops around 2900 A., which increases in intensity on storage in the dark and is reduced on re-irradiation to about the pre-storage value. His explanation of this phenomenon with nylon films was that oxygen was directly responsible for this effect. We have recently been investigating this stepwise ‘post-irradiation effect’ and have found that it occurs with several other polymer films, is no less prominent in nitrogen than in oxygen, and is not restricted to a particular absorption band. It therefore seems doubtful whether these changes in absorption spectra are the result of the reaction of the polymer with oxygen.
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References
Ford, R. A., Nature, 176, 1023 (1955).
Egerton, G. S., J. Soc. Dyers Col., 65, 764 (1949).
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EGERTON, G., ROACH, A. Photochemistry of Polymer Films. Nature 180, 189–190 (1957). https://doi.org/10.1038/180189a0
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DOI: https://doi.org/10.1038/180189a0
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