Physico-chemical studies on the photostabilization of poly(1-butene) film |
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Authors: | R. P. Singh R. Chandra A. Syamal |
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Affiliation: | (1) Department of Applied Chemistry, Regional Engineering College, 132 119 Kurukshetra, India;(2) Polymer Chemistry Division, National Chemical Laboratory, 411 008 Pune, India |
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Abstract: | Thin films of poly(1-butene) with and withouto-phenanthroline bis(1,3-diphenyl triazine-1-oxide)-cobal(II) [I] in the temperature range of 233–333° K have been degraded in air from a UV light of 253.7 nm. The changes in weight average molecular weights, degree of degradation, quantum yields, enthalpy and free energy of activation, and carbonyl and hydroperoxide contents, were followed as a function of the time of irradiation. The inhibition effect ofI is discussed on the basis of the luminescence and UV spectral data. The chelateI behaves both as a thermal and UV stabilizer due to a combination of different kinds of activity in the same molecule. |
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Keywords: | Isotactic poly(1-butene) o-phenanthroline bis(1,3-diphenyl triazine-1-oxide)-cobalt(II) photodegradation photo-stabilization |
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