Adhesion of plasma-deposited silicon oxide barrier layers on PDMS containing polypropylene

Hoppe, C. and Mitschker, F. and Awakowicz, P. and Kirchheim, D. and Dahlmann, R. and de los Arcos, T. and Grundmeier, G.

Volume: 335 Pages: 25-31
DOI: 10.1016/j.surfcoat.2017.12.015
Published: 2018

The adhesion of SiOx coatings deposited by plasma-enhanced chemical vapor deposition onto injection-molded polypropylene (PP) was investigated as function of polypropylene surface Si enrichment. The PP was either used in its original state or was modified by a by-mixture with small amounts of polydimethylsiloxane (PDMS) in the extrusion process. The substrates where characterized by X-ray photoelectron spectroscopy, attenuated infrared reflection and time of flight spectroscopy; it was seen that the PP/PDMS substrates showed a Si-enriched top layer about 1 nm thick. The adhesion of the SiOx coatings to the PP/PDMS substrates was greatly enhanced with respect to the non-functionalized PP, which shows that adhesion of plasma-deposited SiOx layers to polymer substrates can be improved without the need to deposit intermediate adhesion layers, and without the need to include a plasma pre-treatment step into the process. © 2017 Elsevier B.V.

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