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Factors affecting the tensile strength of rubber gaskets
Oct 26, 2018

Rubber seals The tensile strength of this material is the limit of characterization data against tensile load damage. There are many factors that affect the tensile strength of industrial rubber. First of all, from the perspective of formula planning, mainly the variety of raw rubber, vulcanization system and the variety and amount of filler. For high tensile strength formula, natural rubber, neoprene or other crystalline rubber or chlorosulfonated polyethylene should be used, and the gelatinization rate is usually about 60%. A good active filler should be chosen and allowed to disperse evenly during mixing. When using active fillers to make up, the amount should be suitable. Secondly, the tensile strength of the rubber sheet is related to the layout of the rubber. When the amount is small, the sub-molecular interaction of the intermolecular interaction is small. Therefore, when the external force is greater than the intermolecular action, the intermolecular slip occurs and the data is damaged. On the contrary, the molecular weight is large, the interaction between the molecules is increased, the cohesive force of the rubber material is improved, and the chain segment is not easy to slide when stretched, so the degree of damage of the data is small. All other factors affecting the intermolecular forces have an effect on the tensile strength. For example, NR / CR / CSM has a crystalline substituent on the rubber main chain, the molecular strength between the molecules is greatly improved, and the tensile strength is also progressing. That is, one of the main reasons for the self-reinforcing properties of these rubbers. Usually the rubber progresses with crystallinity and the tensile strength increases. The final tensile strength is also related to the temperature, and the tensile strength at high temperatures is much lower than the tensile strength at room temperature. The tensile strength is related to the crosslink density. Following the addition of the crosslink density, the tensile strength is added. After the maximum value is reached, the crosslink density is continuously added, and the tensile strength is greatly reduced.

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