Appropriate use of butyl reclaimed rubber in butyl rubber products can effectively reduce the cost of raw materials. Paraffin oil and butyl rubber have good mutual solubility, so paraffin oil is often used when butyl rubber/reclaimed rubber is used to prepare butyl rubber products, which gives the rubber good comprehensive physical properties. The amount of paraffin oil directly affects the elongation, elasticity, tearing performance, flexing and cracking resistance and scorch performance of butyl rubber/reclaimed rubber vulcanizates. Reasonable determination of the amount of paraffin oil can further improve the synthesis of butyl vulcanizates. Physical properties.
1. The effect of the amount of paraffin oil on the physical and mechanical properties of butyl rubber/reclaimed rubber
Butyl rubber/butyl reclaimed rubber uses paraffin oil as the softening process oil. As the amount of paraffin oil increases, the tensile strength of butyl rubber/reclaimed rubber vulcaniz The hardness of 2YLYY624 is slightly decreased, and the permanent deformation of the compound has little change. With the increase in the amount of paraffin oil, the elasticity and heat-generating properties of the butyl rubber/reclaimed rubber vulcanizates remain basically unchanged, while the tear strength of the vulcanizates increases first and then decreases.
2. The effect of the amount of paraffin oil on the flexural fatigue performance of butyl rubber/reclaimed rubber
When using butyl rubber and butyl reclaimed rubber to prepare low-cost butyl rubber products, with the increase in the amount of paraffin oil, the flexing and cracking of the vulcanized rubber is improved, and the crack is almost unchanged; the fatigue resistance of the vulcanized rubber is As the amount of rubber oil increases, it first increases and then decreases. After the amount reaches a certain value, the fatigue performance will basically not change.
3. The effect of the amount of paraffin oil on the vulcanized scorch performance of butyl rubber/reclaimed rubber
Vulcanization is an important process in the production process of rubber products, and the scorch performance directly affects the quality of the finished vulcanizate. Scorch refers to the early vulcanization phenomenon that occurs during rubber processing. Adjusting the matching system can improve the scorch performance of the rubber. In actual production, the scorch time of butyl rubber/reclaimed rubber vulcanizates will increase with the increase of the amount of paraffin oil, and the vulcanization speed will slow down. Therefore, when adjusting the paraffin oil to improve the scorch performance of the rubber compound, it is also necessary to fully consider the change of the vulcanization speed, and adjust the variety and dosage of the accelerator.
When butyl rubber and butyl reclaimed rubber are used together to produce cost-effective butyl rubber products, the basic indicators of reclaimed rubber, the ratio of raw rubber to reclaimed rubber, the vulcanization system, and the reinforcement system will also affect the butyl rubber/reclaimed rubber. The physical properties of vulcanizates, the editor will have the opportunity to continue discussing related issues with you in the later period.
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