Improving the tensile strength of rubber can be achieved in a variety of ways, such as:
- Adding reinforcers: reinforcers can improve the mechanical properties of rubber. Common reinforcements include carbon black, silica, glass fiber and so on. Among them, carbon black is one of the most commonly used reinforcements, which can significantly improve the tensile strength and wear resistance of rubber.
- Changing vulcanization conditions: vulcanization is an important part of rubber processing, and changing vulcanization conditions can affect the tensile strength of rubber. For example, increasing the amount of curing agent, increasing the curing temperature and prolonging the curing time can improve the tensile strength of rubber.
- Control curing temperature and time: proper curing temperature and time can improve the tensile strength of rubber. Generally speaking, increasing the curing temperature can shorten the curing time, accelerate the curing speed and improve the tensile strength of rubber. However, too high curing temperature may lead to excessive vulcanization of rubber and reduce its tensile strength.
- Optimized formula: by optimizing the rubber formula, the processability and mechanical properties of rubber can be improved. For example, properly increasing the ratio of fillers to reinforcers and changing the physical and chemical properties of rubber can improve the tensile strength of rubber.
- Rubber and resin: rubber and some resins can improve the tensile strength of rubber. For example, the co-use of nitrile butadiene rubber and PVC can improve the tensile strength of vulcanized compound.
- Modified rubber and fillers: the tensile strength of rubber can be improved by modifying rubber and fillers. For example, reactive modifiers are added to the compound, and chemical and adsorption bonds are formed between rubber molecules and between rubber and fillers through the interaction between modifiers and rubber and fillers, so as to improve the tensile strength of vulcanizates.