Modulus changes degradation rate

The degradation properties of an enzyme-responsive polymeric formulation can be characterized upon exposure to high concentrations of substrate enzymes by monitoring changes in the elastic modulus over time. To simplify data comparison, all elastic moduli are normalized to the initial time-zero elastic modulus value for each sample. The degradation rate trends exhibited by the soluble polymers translate into tunable degradation of the formulation [71]. 

The rate of changes in modulus resulted from accelerated aging expressed by (Table 3.11). Those at 0.75 phr fullerene suggest that this filler substantially reduced the effects of rubber degradation. 

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