Relationship between Orthogonal Rotation Design Formula Performance and Variables

The mathematical model of the relationship between the performance and the variables of the orthogonal rotation design formulae is: the quadratic universal rotation combination design of three factors, the universal rotation combination design variable and the level, and the general rotation combination design test formulation. Tear strength (1) Accelerator DM/D and the amount and the use of carbon black/silica in combination Tear strength The promoter DM/D and the amount of carbon black/silica used in comparison with the rubber tear strength As a result, the tear strength decreases with increasing amount of accelerator DM/D. At the same time, when the amount of accelerator is constant, the tear strength tends to decrease as the amount of carbon black increases. This shows that white carbon black contributes more to tear strength than carbon black, and increasing the amount of white carbon can improve the tear strength. The impact of the tear strength on the accelerator DM/D was compared with the amount of S-SBR/BR used to compare the effect of the tear strength of the rubber. When the S-SBR/BR ratio is constant, the tear strength generally decreases with the increase in the amount of accelerator DM/D and the amount of accelerator. When the amount of accelerator DM/D is less than 1.2/0.6, the tear strength hardly changes with the change of the S-SBR/BR ratio. When the amount of accelerator DM/D is larger, the tear strength increases with the increase of the amount of S-SBR.

Tensile Strength. Accelerator DM/D and the amount and the use of carbon black/silica in combination with the tensile strength of the promoter DM/D and the amount of carbon black/silica used in comparison with the tensile strength of the compound, the tensile strength The larger values ​​are centered on the upper left and lower right of the figure, ie high accelerator, low carbon black, or high carbon black, low accelerator dosage. The influence of the tensile strength of the accelerator DM/D and the amount of S-SBR/BR used in comparison with the tensile strength of the rubber. It can be seen that if the amount of the accelerator DM/D is constant and the BR content is less than 50 parts, the tensile strength decreases with the increase of the BR content. When the amount of BR is less than 30 parts, the amount of DM/D accelerator used has little effect on the tensile strength. The amount of S-SBR has a great influence on the tensile strength of the rubber compound. When the accelerator DM/D is used in an amount of 1.4/0.7, a high tensile strength can be obtained with a high S-SBR content. All three factors have the lowest value within the selected level, indicating that a reasonable combination of levels is the key to achieving high strength. White carbon black, accelerators, S-SBR high or high carbon black, suitable accelerators Dosage, high S-SBR dosage can obtain high strength.