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Adhesion between a suspended polymeric film and a metallic substrate: Experiments and models

Published online by Cambridge University Press:  10 July 2012

Jing Du ,
Emily Hampp ,
Wanliang Shan ,
Hannah Li ,
George Papandreou ,
Cynthia A. Maryanoff  and
Winston O. Soboyejo
Jing Du
Affiliation:
Princeton Institute for the Science and Technology of Materials, Princeton University, Princeton, New Jersey 08544; and The Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544
Emily Hampp
Affiliation:
Princeton Institute for the Science and Technology of Materials, Princeton University, Princeton, New Jersey 08544; and The Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544
Wanliang Shan
Affiliation:
Princeton Institute for the Science and Technology of Materials, Princeton University, Princeton, New Jersey 08544; and The Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544; and Cordis Corporation, a Johnson & Johnson Company, Spring House, Pennsylvania 19477
Hannah Li
Affiliation:
Cordis Corporation, a Johnson & Johnson Company, Spring House, Pennsylvania 19477
George Papandreou
Affiliation:
Cordis Corporation, a Johnson & Johnson Company, Spring House, Pennsylvania 19477
Cynthia A. Maryanoff
Affiliation:
Cordis Corporation, a Johnson & Johnson Company, Spring House, Pennsylvania 19477
Winston O. Soboyejo*
Affiliation:
Princeton Institute for the Science and Technology of Materials, Princeton University, Princeton, New Jersey, 08544; and The Department of Mechanical and Aerospace Engineering, Princeton University, Princeton, New Jersey 08544; and Department of Materials Science and Engineering, The African University of Science and Technology, Abuja, Federal Capital Territory, Nigeria
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

This paper presents the results of a combined experimental, theoretical, and computational study of the adhesion between suspended polymeric films and a substrate in a model drug-eluting stent. Atomic force microscope is used to measure the pull-off force between the polymer and the substrate. The adhesion energy was then obtained from the measured pull-off forces and adhesion theories. Subsequently, the adhesion energy was incorporated into interfacial fracture mechanics zone model that was used to determine mode mixity dependence of the interfacial fracture toughness. The mode mixity-dependent fracture toughness conditions were then integrated into finite element models that were used to compute the critical push-out force of the suspended polymeric films. The predicted push-out forces were in good agreement with the results obtained from the experiments.

Type
Articles
Information
Journal of Materials Research , Volume 27 , Issue 14 , 28 July 2012 , pp. 1797 - 1805
Copyright
Copyright © Materials Research Society 2012

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References

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