Measurement Approaches to Develop a Fundamental Understanding of Scratch and Mar Resistance.
Measurement Approaches to Develop a Fundamental
Understanding of Scratch and Mar Resistance.
VanLandingham, M. R.; Chang, N, K.; Wu, T. Y.; Chang, S.
H.; Sung, L. P.; Jardret, V. D.
Federation of Societies for Coatings Technology (FSCT)
Technical Program Annual Meeting, 81st. November 12-14,
2003, Philadelphia, PA, Federation of Societies for
Coatings Technology, Blue Bell, PA, 2003.
microscopy; confocal microscopy; creep compliance;
indentation; modulus; mechanical properties; optical
characterization; scratch and Mar; strain and stress;
Instrumented indentation and confocal microscopy were
used to characterize the surface mechanical response of
polymeric materials. Viscoelastic behavior was measured
using instrumented indentation. A model based on contact
between a rigid probe and a viscoelastic material was
used to calculate values for creep compliance and stress
relaxation modulus for two polymeric materials, epoxy
and poly(methyl methacrylate) or PMMA. Scratch testing
was performed on these materials with various probes
under a variety of conditions, and confocal microscopy
was used to characterize the resulting deformation.
Relationships between viscoelastic behavior, scratch
damage and appearance are currently being explored using
these methods along with finite element modeling.