Degradation of magnetic tape: binder oxidation studies

✍ Scribed by M. Edge; N.S. Allen; W. Chen; C.V. Horie

• Book ID: 103075864
• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 391 KB
• Volume: 29
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(93)90304-x

✦ Synopsis

Commercial videotapes have been artificially aged to quantify extent of binder degradation. Analysis by attenuated total reflectance FTIR shows evidence for the growth of absorptions in the C--q) stretching region. It is due to oxidative degradation of the various binders which occurs rapidly, with the magnetic ferric oxide playing a major role in inducing the growth and decomposition of active hydroperoxides. Initial concentrations of hydroperoxides in the binder layers were found to vary significantly with the manufacturing operation. Hydroperoxide decomposition rates increased with increasing humidity levels and temperature giving rise to concurrent increases in the rates of increase of C---O absorption in the i.r. at 1170 cm-~. Although increasing humidity levels may instigate hydrolysis, for oxidation moisture may be serving as a plasticizer. Arrhenius plots are given for the binder layer using a measure of the C--O absorption as the criterion of deterioration. Linear relationships were not obtained suggesting parallel degradation mechanisms.

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