Adhesion enhancement via crystalline-embedded entanglements in melt-processed layered structures

P. J. Cole, C. W. Macosko

Research output: Contribution to journalConference articlepeer-review

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.

Original languageEnglish (US)
Pages (from-to)FF8.6.1-FF8.6.6
JournalMaterials Research Society Symposium - Proceedings
Volume629
StatePublished - Dec 1 2000
EventInterfaces, Adhesion and Processing in Polymer Systems - San Francisco, CA, United States
Duration: Apr 24 2000Apr 27 2000

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