Corona-induced autohesion of polyethylene

Authors

  • C. Y. Kim,

    1. Physical Chemistry Section, Pulp and Paper Research Institute of Canada, and Department of Chemistry, McGill University, Montreal, Quebec, Canada
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  • J. Evans,

    1. Physical Chemistry Section, Pulp and Paper Research Institute of Canada, and Department of Chemistry, McGill University, Montreal, Quebec, Canada
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  • D. A. I. Goring

    1. Physical Chemistry Section, Pulp and Paper Research Institute of Canada, and Department of Chemistry, McGill University, Montreal, Quebec, Canada
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Abstract

If a low-density polyethylene sheet is treated in a corona discharge and subsequently pressed to a similarly treated sheet at 45°C, the bond formed is much stronger than that between similarly pressed but untreated sheets. Several series of observations have indicated that this enhanced autohesion is not due to surface oxidation or to surface crosslinking (CASING). Evidence is presented that the effect may be related to some type of electret formation induced in the polymer sheet by the corona discharge.

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