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Measurement of Polymer-Polymer Adhesion in Thin Multi-Layer Systems by Means of Micro-Scratch Probing

Published online by Cambridge University Press:  17 March 2011

Y. S. Garif
Affiliation:
Dept. of Chemical Engineering and Materials Science, University of Minnesota Minneapolis, MN 55455, U.S.A.
W. W. Gerberich
Affiliation:
Dept. of Chemical Engineering and Materials Science, University of Minnesota Minneapolis, MN 55455, U.S.A.
C. W. Macosko
Affiliation:
Dept. of Chemical Engineering and Materials Science, University of Minnesota Minneapolis, MN 55455, U.S.A.
A. V. Pocius
Affiliation:
3M Company, Adhesive Technologies Center St. Paul, MN 55144, U.S.A.
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Abstract

A novel technique called Cross-Sectional Scratch (CSS) has been established. The technique employs a sliding contact of an indenter tip across a polymer stack cross-section. The main advantage of the technique is that it allows to measure/quantify interfacial adhesion in multilayer polymer films that are only a few microns thick. CSS has successfully tested both glassy/glassy and glassy/soft polymer interfaces. Thus, PS/PE, PET/PE, PS/PMMA and PVdF/PMMA co-extruded films were chosen as sample systems and tested at room temperature. It was found that indenter speed has a strong effect on the magnitude of the adhesion energy measured. The dependence has a power law form with indices ∼ 0.1-0.2. More viscoelastic systems have higher power law index, a measure of rate sensitivity.

Type
Research Article
Copyright
Copyright © Materials Research Society 2002

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References

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