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Quantitative nanoscale mechanical properties of a phase segregated homopolymer surface

Published online by Cambridge University Press:  31 January 2011

J. F. Graham ,
M. Kovar ,
P. R. Norton ,
P. Pappalardo ,
J. Van Loon  and
O. L. Warren
J. F. Graham
Affiliation:
Interface Science Western and Department of Chemistry, University of Western Ontario, London, Ontario, N6A 5B7, Canada
M. Kovar
Affiliation:
Interface Science Western and Department of Chemistry, University of Western Ontario, London, Ontario, N6A 5B7, Canada
P. R. Norton
Affiliation:
Interface Science Western and Department of Chemistry, University of Western Ontario, London, Ontario, N6A 5B7, Canada
P. Pappalardo
Affiliation:
Diversey Lever, Innovation Centre, 46701 Commerce Centre Drive, Plymouth, Michigan 48170
J. Van Loon
Affiliation:
Interface Science Western and Department of Chemistry, University of Western Ontario,London, Ontario, N6A 5B7, Canada
O. L. Warren
Affiliation:
Interface Science Western and Department of Chemistry, University of Western Ontario,London, Ontario, N6A 5B7, Canada
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Abstract

Crystallization of poly(ethylene terephthalate) (PET) is accompanied by significant changes in surface topography, easily detected by atomic force microscopy (AFM). Phase imaging by AFM qualitatively indicates contrast in mechanical properties of nanometer scale areas of an annealed PET surface, but cannot provide quantitative data. Using interfacial force microscopy (IFM), we have, for the first time, made quantitative measurements of the elastic moduli of such nm-scale areas on a homopolymer surface. Values of 2.2 GPa, 4.3 GPa, and 11.8 GPa, were found, respectively, for amorphous PET and for phase segregated regions on the surface of an annealed homopolymer PET sample. The method is applicable to any phase segregated surface with nm-sized domains of differing elastic moduli.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 12 , December 1998 , pp. 3565 - 3570
Copyright
Copyright © Materials Research Society 1998

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