Abstract
The vulcanizing properties and thermal decomposition of methyl vinyl silicone rubber/ polyurethane rubber blends were studied. The results of vulcanization show that with the addition of polyurethane rubber, the viscosity, cross-linking density, activation energy and vulcanization rate of the blends decreased while the scorch behavior was not significantly changed. For the decomposition behavior, the maximum thermal decomposition rate of the blends was increased with increasing content of polyurethane rubber; however, the thermal stability of the blends was decreased. Analysis of the thermal decomposition kinetics shows that the activation energy of the blends gradually decreased.
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