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Effect of photochemical ageing on the tensile properties and behaviour law of unstabilized films of low-density polyethylene

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Abstract

Films of low-density polyethylene (LDPE) were exposed to artificial ageing in a photochemical reactor, and photochemical ageing was observed by tensile measurements. Oxidative degradation was characterized from carbonyl groups formation using infrared spectroscopy. Only ultimate properties seem to be affected, elastic properties being practically unaffected. In fact, the most obvious chemical effect induced in LDPE by exposure is the formation of carbonyl groups easily observable by infrared spectroscopy. Some elementary acts of the oxidation process induce chain scissions responsible for the decrease of elongation at break.

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Authors and Affiliations

  1. Laboratoire de Mécanique Physiquen URA CNRS 867, 351, cours de la libération, 33405, Talence, France

    M. Lassiaz & J. Pouyet

  2. Ecole Nationale Supérieure d'Arts et Métiers, 151 Bd de l'Hospital Paris 13e, 75640, Paris Cedex 13, France

    J. Verdu

Authors
  1. M. Lassiaz
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  2. J. Pouyet
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  3. J. Verdu
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Lassiaz, M., Pouyet, J. & Verdu, J. Effect of photochemical ageing on the tensile properties and behaviour law of unstabilized films of low-density polyethylene. J Mater Sci 29, 2177–2181 (1994). https://doi.org/10.1007/BF01154697

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  • DOI: https://doi.org/10.1007/BF01154697

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