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Scratching Behavior of Poly(N-Butyl Acrylate) Films

Published online by Cambridge University Press:  10 February 2011

S. L. Zhang ,
A. H. Tsou  and
J. C. M. Li
S. L. Zhang
Affiliation:
Department of Mechanical Engineering, University of Rochester, Rochester, NY 14627
A. H. Tsou
Affiliation:
Manufacturing Research and Engineering, Eastman Kodak Company, Rochester, NY 14652
J. C. M. Li
Affiliation:
Department of Mechanical Engineering, University of Rochester, Rochester, NY 14627
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Abstract

Scratch testing was performed on the poly(n-butyl acrylate) (PnBA) films using a spherical indenter. For the uncrosslinked PnBA film, the horizontal force during scratching increases with the normal load and has a residual value (˜ 0.6 g) as the normal load approaches zero. The relation can be fitted by using the JKR theory. With increasing driving speed, the coefficient of friction increases but the rate of increase becomes less. For the crosslinked PnBA film which behaves like an elastomer, the horizontal force approaches zero at zero normal load. Below a critical normal load, which depends on the failure mechanism and the thickness of the film, the crosslinked film recovers elastically after being scratched. Above the critical load, the film is damaged and, depending on the film thickness, shows two distinct damage mechanisms.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 522: Symposium T – Fundamentals of Nanoindentation & Nanotribology , 1998 , 371
Copyright
Copyright © Materials Research Society 1998

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