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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: maszyw@nus.edu.sg
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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

REFERENCES

1Cai, X. and Bangert, H.: Hardness measurements of thin films-determining the critical ratio of depth to thickness using FEM. Thin Solid Films 264, 59 (1995).CrossRefGoogle Scholar
2Saha, R. and Nix, W.D.: Effects of the substrate on the determination of thin film mechanical properties by nanoindentation. Acta Mater. 50, 23 (2002).CrossRefGoogle Scholar
3Sakai, M.: Time-dependent viscoelastic relation between load and penetration for an axisymmetric indenter. Philos. Mag. A 82, 1841 (2002).CrossRefGoogle Scholar
4Strojny, A. and Gerberich, W.W.: Experimental analysis of viscoelastic behaviors in nanoindentation. in Fundamentals of Nanoindentation and Nanotribology, edited by Moody, N.R., Gerberic, W.W., Burnham, N., and Baker, S.P. (Mater. Res. Soc. Symp. Proc. 522, Warrendale, PA, 1998), p. 159.Google Scholar
5Yoder, K.B., Ahuja, S., Dihn, K.T., Growson, D.A., Corcoran, S.G., Cheng, L. and Gerberich, W.W.: Nanoindentation of viscoelastic materials: Mechanical properties of polymer coatings on aluminum substrates in Fundamentals of Nanoindentation and Nanotribology, edited by Moody, N.R., Gerberic, W.W., Burnham, N., and Baker, S.P. (Mater. Res. Soc. Symp. Proc. 522, Warrendale, PA, 1998), p. 205.Google Scholar
6Cheng, L., Xia, X., Yu, W., Scriven, L.E. and Gerberich, W.W.: Flat-punch indentation of viscoelastic material. J. Polym. Sci., Part B: Polymer. Phys. 38, 10 (2000).3.0.CO;2-6>CrossRefGoogle Scholar
7Lucas, B.N., Oliver, W.C., Pharr, G.M. and Loubet, J.L.: Time-dependent deformation during indentation testing, in Thin Films: Stresses and Mechanical Properties VI, edited by Gerberich, W.W., H.Gao, J-E. Sundgren, and S.P. Baker (Mater. Res. Soc. Symp. Proc. 436, Warrendale, PA, 1997), p. 233.Google Scholar
8Yang, S., Zhang, Y.W. and Zeng, K.Y.: Analysis of nanoindentation creep for polymeric materials. J. Appl. Phys. 95, 3655 (2004).CrossRefGoogle Scholar
9Oyen, M.L. and Cook, R.F.: Load-displacement behavior during sharp indentation of viscous-elastic-plastic materials. J. Mater. Res. 18, 139 (2003).CrossRefGoogle Scholar
10Shimizi, S., Yanagimoto, T. and Sakai, M.: Pyramidal indentation load-depth curve of viscoelastic materials. J. Mater. Res. 14, 4075 (1999).CrossRefGoogle Scholar
11Adams, M.J., Gorman, D.M., Johnson, S.A. and Briscoe, B.J.: Indentation depth recovery in poly(methyl methacrylate) sheet on the microlength scale. Philos. Mag. A 82, 2121 (2002).CrossRefGoogle Scholar
12Krupicka, A., Johansson, M. and Hult, A.: Viscoelasticity in polymer films on rigid substrates. Macomol. Mater. Eng. 288, 108 (2003).CrossRefGoogle Scholar
13Yu, H.Y., Sanday, S.C. and Rath, B.B.: The effect of substrate on the elastic properties of films determined by the indentation test–Axisymmetric Boussinesq problem. J. Mech. Phys. Solids 38, 745 (1990).CrossRefGoogle Scholar
14Johnson, K.L.: Contact Mechanics (Cambridge University Press, Cambridge, U.K., 1985).CrossRefGoogle Scholar
15Lebedev, N.N.: An axisymmetric contact problem of an elastic layer on an elastic substrate. J. Appl. Math. Mech. 22, 442 (1958).CrossRefGoogle Scholar
16Soles, C.L., Douglas, J.F., Wu, W.L. and Dimeo, R.M.: Incoherent neutron scattering as a probe of the dynamics in molecularly thin polymer films. Macromolecules 36, 373 (2003).CrossRefGoogle Scholar
17Ovaert, T.C., Kim, B.R. and Wang, J.J.: Multi-parameter models of the viscoelastic/plastic mechanical properties of coatings via combined nanoindentation and non-linear finite element modeling. Prog. Org. Coat. 47, 312 (2003).CrossRefGoogle Scholar
18Hong, L., Wang, X. and Tang, X.: Studies on hyper-branched polyurethane by multi-detector size exclusion chromatography. J. Appl. Polym. Sci. 85, 2445 (2002).CrossRefGoogle Scholar