Calcium-Lignosulfonate-Filled Rubber Compounds Based on NBR with Enhanced Physical-Mechanical Characteristics.

The tensile strengths of the vulcanizates based on carbon black batch were much higher, owing to the presence of reinforcing carbon black, and showed an increasing trend with increasing contents of glycerine.

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This theory could be partially supported by the decrease in the cross-link density of the vulcanizates based on carbon black batch, which upon a slight initial increase at 5 phr of glycerine, showed a decreasing trend with increasing plasticizer contents ( Figure 9 ).

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