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(1) the effect of crosslinking density of vulcanised rubber wear resistance with the increase in crosslinking density has an optimal value, the optimal value depends not only on the vulcanisation system but also and the amount of filler and the degree of structure. The problem can be explained by the concept of the optimum stiffness of the wear resistance, in increasing the amount of filler and the degree of structure, the stiffness provided by the filler will increase, if you want to maintain the optimum value of the stiffness of the vulcanised rubber, it is necessary to reduce the rigidity provided by the vulcanisation system part of the cross-linking density is appropriately lowered, and vice versa, the cross-linking density of the vulcanised rubber should be increased. The optimum mixing temperature for unsaturated rubber-based compounds is 140-150°C, while saturated rubbers can be mixed at 160-180°C. In the case of unsaturated rubbers, the mixing temperature can be set to 140-150°C, while saturated rubbers can be mixed at 160-180°C. Increase the temperature in the later stages of mixing, can enhance the interaction between raw rubber and carbon black, improve the elasticity of the rubber, improve abrasion resistance, especially the saturated rubber abrasion resistance. If the mixing time is shortened below the optimum time, the abrasion resistance decreases. Abrasion resistance increases with increasing vulcanising pressure and decreases with increasing vulcanising temperature.
(2) Relationship with the type of crosslinking bond Tests show that the more the content of single sulfur bond, the better the abrasion resistance of vulcanised rubber. The relationship between abrasion resistance and the type of crosslinking bond of vulcanised rubber still needs further research. Generally, the S+CZ system gives good abrasion resistance. The most commonly used vulcanisation system is to use CZ as the main accelerator together with co-accelerators (TMTD, D, DM).
(2) Relationship with the type of crosslinking bond Tests show that the more the content of single sulfur bond, the better the abrasion resistance of vulcanised rubber. The relationship between abrasion resistance and the type of crosslinking bond of vulcanised rubber still needs further research. Generally, the S+CZ system gives good abrasion resistance. The most commonly used vulcanisation system is to use CZ as the main accelerator together with co-accelerators (TMTD, D, DM).
