Abstract
A series of controlled aging experiments laboratory and service were conducted on a
variety of rubber and plastic components. After laboratory and service aging conditions,
we studied the modulus changes using the modulus profiling technique pioneered by K
Gillen. The location and extent of aging was determined. The modulus changes in
both the exterior and interior regions were quantified, thereby quantifying the location
and extent of agin within the component. In earlier work, modulus profiling was
applied to tire aging. Now, this technique is extended to other products, both rubber and
plastic components. A variety of components were studied, including hose, v-belt, wiper
blade, o-ring, rubber band, tread surface, cable jacket, and polycarbonate. A rationale is
presented in consideration of the concomitant changes in modulus due to effects of
oxidation and mechanical energy. The technique has improved our understanding of
aging in a wide variety of products.
To obtain a full-text copy of this paper, please email Ed Terrill or visit Rubber Division, ACS at www.rubber.org
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