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Extracting the mechanical properties of a viscoelastic polymeric film on a hard elastic substrate

Published online by Cambridge University Press:  01 October 2004

C.Y. Zhang ,
Y.W. Zhang  and
K.Y. Zeng
C.Y. Zhang
Affiliation:
Department of Materials Science, National University of Singapore, Singapore 119260, Singapore
Y.W. Zhang*
Affiliation:
Department of Materials Science, National University of Singapore, Singapore 119260, Singapore
K.Y. Zeng
Affiliation:
Institute of Materials Research and Engineering, Singapore 117302, Singapore
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

A semi-analytical approach was developed to study the creep response of a viscoelastic polymeric thin film on a hard elastic substrate under flat-ended punch indentation. This approach allows one to separate mechanical properties of the film from its substrate. To verify the approach, flat-ended punch creep indentation tests were performed to obtain the long-time viscoelastic behaviors of a polymethyl-methacrylide film overlying on an aluminum substrate. Three viscoelastic models describing the constitutive equations of the polymer film are compared in this paper. “Film-only” viscoelastic parameters were extracted by fitting with the experimental creep curves of flat-ended punch indentation. It is shown that the present approach provides an effective way to characterize the mechanical properties of a polymeric film on an elastic substrate.

Keywords

Thin filmPolymerIndentation
Type
Articles
Information
Journal of Materials Research , Volume 19 , Issue 10 , October 2004 , pp. 3053 - 3061
Copyright
Copyright © Materials Research Society 2004

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References

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