two variables affecting cure and reversion have been studied: the amount of carbon
black loading, and temperature of cure. It has been observed that reversion and G'(max)
were significantly affected by carbon black loading. An increase in loading showed a decrease
in reversion and an increase in G'(max). As the cure temperature was increased, an increase
in the reversion process was also observed. For all samples studied, natural rubber exhibited
more of a tendency to undergo reversion than identically formulated and cured guayule rubber samples.