Abstract
The distribution of sulphur in blends based on the rubbers SKD, SKS-30 ARK, SKI-3 and SKN-40, either unfilled or filled with the commercial carbons grade PM-100 and DG-100 has been investigated from the change in the rubbers' glass-transition temperature after their mixing. The unfilled rubbers are placed in the following order with respect to the degree of chemical combination with sulphur: SKS-30>SKD>SKD-40≈SKI-3, and for the unfilled rubbers: SKD>SKS-30>SKN-40≈SKI-3. The effects of the initial sulphur distribution, the initial and final vulcanization activities and the diffusion properties of the rubbers on the fixing of sulphur in the phases of the mixed elastomers are reported.
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