Abstract

The Taber test, as described in ASTM D-1044, combined with haze-level measurement, as described in ASTM 1003, is a commonly used method in many industries to evaluate resistance of material surfaces to abrasion. Attempts were made to use the Taber test to characterize a coated polycarbonate automotive window. However, the results did not represent the performance of the product in actual service very well. Atomic force microscopy was used to examine the abraded surfaces after the Taber test and carry out a statistical analysis to explain the observed haze development (the haze after abrasion less the haze before abrasion). It was found that the Taber test data in evaluation of the layered material had a larger standard of deviation than glass due to the occasional occurrence of delamination and chipping at the surface. In addition, its crossed-scratch abrasion pattern might not be a good simulation of the real abrasion experience of the automotive windows.

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