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Adhesion Enhancement Via Crystalline-Embedded Entanglements in Melt-Processed Layered Structures

Published online by Cambridge University Press:  01 February 2011

Phillip J. Cole  and
Christopher W. Macosko
Phillip J. Cole
Affiliation:
Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE Minneapolis, MN 55455
Christopher W. Macosko
Affiliation:
Department of Chemical Engineering and Materials Science, University of Minnesota, 421 Washington Avenue SE Minneapolis, MN 55455
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Abstract

Improving the adhesion of polyolefins to glassy polymers is complicated by the semicrystalline nature of the polyolefins. Traditional methods used in glassy polymers to increase the interlayer adhesion, including the addition of a diblock copolymer or the formation of a copolymer through in situ reaction, are still successful with semicrystalline polymers. However, melt miscibility of the adhesion promoting molecules is not the only consideration; co-crystallization can also be significant. Even when co-crystallization is achieved, the reactive method is shown to provide greater fracture toughness than the addition of a pre-made diblock copolymer. In the latter case, the formation of micelles limits the efficiency of the diblock copolymer. Finally, significant adhesion enhancement is attainable in reactive systems with contact times as short as 45 seconds as demonstrated through a multilayer coextrusion of amorphous nylon against a polypropylene-maleated polypropylene blend.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 629: Symposium FF – Interfaces, Adhesion and Processing in Polymer Systems , 2000 , FF8.6
Copyright
Copyright © Materials Research Society 2000

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References

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