Analysis of the plasticizing process of rubber timing belt
The analysis found that the relative molecular weight of rubber is related to its final plasticity. The smaller the molecular weight, the lower the viscosity and the greater the plasticity. Therefore, we plasticize rubber to shorten the length of the macromolecules in the molecular chain of the rubber timing belt.
In the process of plasticizing, the mechanical force is mainly shear stress, which will directly affect the molecules of the industrial rubber timing belt and break the macromolecular chain. However, the gravity between the huge rubber molecules is also very large. After repeated forces, the long-chain molecules will break the molecular chains due to the entangled interweaving structure, and then the active radicals of the broken chains are received by oxygen or other radical acceptors. Stable, it will generate some shorter tape molecules.
Generally speaking, different conveyor belts have different locations where the molecular force is concentrated. The acid and alkali resistant conveyor belt is in the middle, and most of the molecular chains are broken in the middle. Because the molecules of the nylon conveyor belt are not easy to slide, the force of the raw rubber of the ordinary rubber conveyor belt increases, and the molecules are easily cut by the shear stress, and the resulting plasticizing effect will increase accordingly. That is, the longer the water plasticizing time, the more fractures, and the smaller the average molecular weight.