Abstract
Surface roughness as an indicator of filler dispersion has typically been measured
by mechanical or optical methods. Optical methods provided both a direct measurement
and a fast determination of surface roughness. Actual percent carbon black dispersion has
been approximated by applying transmitted light microscopy according to the Leigh
Dugmore calculation. An optical reflected light method has been developed that gives a
percent dispersion by a means similar to the transmitted light method by using the size and
frequency of the surface disturbances. The new method will be discussed comparing the
results to the Leigh-Dugmore calculation and looking at a variety of compounds and fillers.
To obtain a full-text copy of this paper, please email Bob Samples or visit Rubber Division, ACS at www.rubber.org
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