The mathematical model of the relationship between the performance of the orthogonal rotation design formula and the variables is: a three-factor quadratic general rotation combination design, a general rotation combination design variable and level, and a general rotation combination design test formula. Tear strength (1) The combination of accelerator DM/D and carbon black/silica has the effect on tear strength. The combination of accelerator DM/D and carbon black/silica has the effect on rubber tear strength The tear strength decreases with the increase of the combined dosage of the accelerator DM/D. At the same time, when the amount of accelerator does not change, as the amount of carbon black increases, the tear strength tends to decrease. This shows that the contribution of white carbon black to the tearing strength is greater than that of carbon black, and increasing the amount of white carbon black can improve the tearing strength. The effect of the ratio on the tear strength The effect of the combined dosage of accelerator DM/D and S-SBR/BR on the tear strength of the rubber compound. When the combined use ratio of S-SBR/BR remains unchanged, the tear strength generally decreases with the increase in the combined use of accelerator DM/D. When the combined amount of accelerator DM/D is less than 1.2/0.6, the tearing strength hardly changes with the change of the combined ratio of S-SBR/BR. When the accelerator DM/D is used in a larger amount, the tear strength increases with the increase in the amount of S-SBR.
Tensile Strength. The effect of the combined dosage of accelerator DM/D and carbon black/silica on the tensile strength The effect of the combined dosage of accelerator DM/D with carbon black/silica on the tensile strength and tensile strength The larger values are concentrated in the upper left and lower right of the figure, namely the high accelerator and low carbon black dosage, or the high carbon black and low accelerator dosage. The effect of the ratio on the tensile strength The effect of the combined dosage of accelerator DM/D and S-SBR/BR on the tensile strength of the compound. It can be seen that if the amount of accelerator DM/D does not change and the amount of BR is less than 50 parts, the tensile strength will decrease with the increase of the amount of BR. When the amount of BR is less than 30 parts, the combined amount of accelerator DM/D has little effect on the tensile strength. The amount of S-SBR has a greater impact on the tensile strength of the rubber compound. When the combined dosage of accelerator DM/D is 1.4/0.7, select high S-SBR dosage to obtain greater tensile strength. The three factors all have the lowest value in the selected level range, indicating that a reasonable combination of levels is the key to obtaining high strength. High dosage of silica, accelerator, and S-SBR or high dosage of carbon black are suitable for promotion. High strength can be obtained by dosage and high S-SBR dosage.
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