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Bonding of highly oriented polypropylene sheets by epitaxial crystallization of polyethylene

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Abstract

The bonding of highly oriented polypropylene (PP) by means of a thin epitaxial polyethylene (PE) interlayer, was investigated. Epitaxy occurred in HDPE over a range of molecular weight, including ultra-high molecular weights. It was also observed for LDPE, although the epitaxy was less well-developed than for HDPE. Laminates of highly oriented PP thinly coated with PE and treated to induce cross-hatchng of PE showed much improved adhesion, compared with uncoated PP treated in a similar fashion. The PE epitaxy is believed to be responsible for this behaviour. The adhesive performance was also shown to be a function of the molecular weight and its distribution of PE, as well as of the annealing treatment of the PE coat.

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Author notes

  1. I. -Hwa Lee

    Present address: E. I. Du Pont de Nemours & Co., Inc., Experimental Station, 19898, Wilmington, Delaware, USA

Authors and Affiliations

  1. Department of Chemical Engineering, University of Delaware, 19716, Newark, Delaware, USA

    I. -Hwa Lee & J. M. Schultz

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  1. I. -Hwa Lee
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  2. J. M. Schultz
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Lee, I.H., Schultz, J.M. Bonding of highly oriented polypropylene sheets by epitaxial crystallization of polyethylene. J Mater Sci 23, 4237–4243 (1988). https://doi.org/10.1007/BF00551913

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