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Quantum yield of photolytic degradation of poly(l-butene)

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Abstract

Thin films of isotatic poly(l-butene) irradiated with a monochromatic light of 253.7 nm undergo random chain-scission in air in the temperature range of 267.0–313.0 °K. Quantum yields in the absence and presence of different stabilizers have been determined using a potassium ferrioxalate actinometer from 0.0188 to 0.00027 scissions per absorbed photon. Quantum yields for scission were independent of intensity. Light scattering technique was used to determine the rate of links breaking for polymeric systems. A saturation limit in photostabilization of isotatic poly(1-butene) by the stabilizers was achieved beyond 0.8, 0.7, 0.6 and 0.5 wt.% of copper(II) bis(1,3-diphenyltriazine-N-oxide) [CPTO], 1.3-diphenyltriazine-N-oxide) [HPTO], o-phenanthroline bis(1,3-diphenyltriazine-N-oxide)cobalt(II) [CPPTO] and 2,4-diphenyl-6-(2′-hvdroxyphenyl)-s-triazine [PHPT], respectively in the matrix of polymer film.

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Authors and Affiliations

  1. Polymer Chemistry Division, National Chemical Laboratory, 411008, Pune, India

    R. P. Singh

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  1. R. P. Singh
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Singh, R.P. Quantum yield of photolytic degradation of poly(l-butene). Polymer Bulletin 5, 443–450 (1981). https://doi.org/10.1007/BF00255981

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  • DOI: https://doi.org/10.1007/BF00255981

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