Natural rubber has high mechanical strength, good elasticity and wear resistance, and is widely used in the production of various rubber products. Butyl reclaimed rubber is a renewable resource processed from waste butyl rubber products as the main raw material, and has the basic performance characteristics of butyl rubber. In actual production, the molecular structures of natural rubber and butyl reclaimed rubber are quite different. Can they be blended? Will product performance be affected? How much is the most suitable blend of butyl reclaimed rubber in natural rubber?
1. The basis of blending natural rubber and butyl reclaimed rubber
Butyl reclaimed rubber has undergone intense treatment processes in its production, including vulcanization, mixing, and oxidation. After production, the butyl reclaimed rubber has a small molecular weight and irregular molecular size, which can be the interface between natural rubber and butyl reclaimed rubber 2YLYY34 The interpenetration and diffusion of the above provide better conditions. Butyl reclaimed rubber itself has high vulcanization reaction activity. Blending with natural rubber can form an interface transition layer, produce co-vulcanization, and achieve process compatibility. Under the appropriate ratio, the natural rubber/butyl reclaimed rubber vulcanizate has good mechanical properties and fatigue resistance.
2. The influence of the amount of butyl reclaimed rubber on the properties of blended rubber
Theoretically, butyl reclaimed rubber and natural rubber can achieve process compatibility and can be blended in any ratio. The fluidity of the rubber is better, which can further improve the heat resistance, aging resistance and air permeability resistance of natural rubber. With the increase in the amount of butyl reclaimed rubber, the tensile strength and elongation stress of the blended rubber decreased, the elongation at break and permanent deformation at break increased slightly, the hardness was almost unchanged, and the aging resistance was significantly improved. The scorch time of the rubber compound is shortened. Therefore, the dosage of butyl reclaimed rubber in natural rubber should be controlled reasonably.
3. The best dosage of butyl reclaimed rubber in natural rubber
In actual production, when natural rubber and butyl reclaimed rubber are used together at a combined ratio of 70:30, the blended rubber has good technical performance, good fluidity, fast powder consumption during the mixing process, and vulcanized rubber has high mechanical strength With good aging resistance, heat resistance and air tightness, it can meet the comprehensive performance requirements of most rubber products.
Compared with butyl rubber, butyl reclaimed rubber is cheaper and has better blending performance with natural rubber. Butyl reclaimed rubber is blended in natural rubber products in an appropriate proportion, which can significantly improve the air permeability and aging resistance of natural rubber products. When blending butyl reclaimed rubber in natural rubber products, rubber product manufacturers need to determine the amount of butyl reclaimed rubber according to actual needs, and increase the amount appropriately if necessary. Butyl reclaimed rubber can also be blended with natural rubber/styrene butadiene rubber And use glue.
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