A study has been made of the effect of increased time of mixing carbon black in rubber on the dynamic properties of the carbon black‐rubber vulcanizates. Increased time of mixing reduces the dynamic modulus and dynamic viscosity as well as the phase angle at moderate amplitudes of oscillation. The changes in dynamic properties with mixing time are shown to be associated with the dispersion of the carbon black.
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A. R. Payne (1965) studied this question.
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