| http://www.w3.org/ns/prov#value | - The difference in toughness and tenacityvalues so determined, however, diminishes rapidly at concentrations of asymmetric, radial polymer above about 12 parts, by weight, per 100 parts, by weight, of bitumen until the values of toughness, tenacity and other key properties reach valuescomparable those of the more conventional, prior art polymeric modifiers.
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