Magnesium oxide is a common chemical, its use is very wide, in the rubber products magnesium oxide can improve the dispersion, with the amount of magnesium oxide increases, the storage energy modulus difference is decreasing trend. The dispersion of filler in rubber is best when the amount of magnesium oxide is a certain proportion.
The effect of the amount of magnesium oxide on the loss modulus of the kneading rubber, with the increase of the amount of magnesium oxide, in order to reduce, indicating that magnesium oxide can destroy the filler in the rubber formed by the aggregation network, improve the dispersion of the filler.
At the same time, it can be seen that the higher the amount of magnesium oxide is not better, the strain corresponding to the peak is not changed, that is, the critical strain of the filler network reconstruction rate is greater than the destruction rate are 0.9%, which means that although the strength of the filler network is obviously weakened, but the density of the network remains unchanged, still maintain a certain reconstruction ability, when the amount of magnesium oxide increases to the maximum, the peak moves to low strain, indicating that the filler network density also When the amount of MgO was increased to the maximum, the peak shifted to the low strain, indicating that the network density of filler was also reduced to a certain extent and the filler dispersion was improved.
The effect of MgO dosage on processing performance, with the increase of MgO dosage, the scorch time of the rubber was slightly shortened, and the Menny viscosity was gradually increased, while ensuring the processing safety, the vulcanization rate was obviously increased, and the processing performance was optimized.