Advantages and disadvantages of the O-ring hydraulic SBR

Styrene-butadiene rubber, the English name Emulsion-polymerized styrene butadiene rubber (E-SBR), also known as polystyrene butadiene copolymer. The physical mechanism of performance, performance and processing properties close to natural rubber products, some more excellent properties such as wear resistance, heat aging resistance and cure rate than natural rubber with natural rubber and various synthetic rubber and used widely areas for tires, belts, hoses, wire and cable, medical equipment and various rubber products hydraulic O-ring production, is the largest common varieties of synthetic rubber, is also one of the first to achieve industrial production of rubber varieties.

1, styrene-butadiene hydraulic O-ring advantage

(1) hydraulic butadiene rubber O-ring is not easy to scorch and over-sulfur vulcanization good flatness.

(2) O-ring hydraulic SBR wear resistance, heat resistance, oil resistance and aging properties better than natural rubber. High temperature wear resistance, suitable for passenger tires.

(3) Hydraulic O-rings SBR processing molecular weight dropped to a certain extent not decrease, and thus not easy too refined, plastic uniformity. Little change in hardness vulcanized rubber.

(4) Hydraulic O-rings SBR increasing the molecular weight can achieve high filling. Oil-filled styrene-butadiene rubber processing performance.

(5) SBR Hydraulic O-rings can easily disadvantage with other unsaturated rubber and use common, especially natural rubber and butadiene rubber, dried adjustment formula can be overcome styrene-butadiene rubber.

2, O-ring hydraulic SBR shortcomings

(1) hydraulic butadiene rubber O-ring pure low intensity, high activity must be added reinforcing agent can be used. Complexing agent added difficult than natural rubber large rubber compounding agents in poor dispersion.

(2) trans structure and more irregular structure, with side groups on the benzene ring, and thus large losses than natural rubber lag, high heat, low elasticity, cold resistance is also somewhat less. But the oil-filled to reduce heat.

(3) Hydraulic O-rings SBR uncured rubber shrinkage, low strength and adhesion performance than natural rubber.

(4) natural rubber vulcanization rate than slower.

(5) SBR vulcanized rubber O-ring hydraulic resistance to flex cracking song than natural rubber is good, but the crack propagation speed. Hot tear resistance is poor.

With the auto industry, the growing consumption of rubber, synthetic rubber used in a proportion increases every year due to Chinese road conditions continue to improve and the continuous development of the highway, the speed also increased, so that the safety performance of the tire higher requirements, but also because as the growing shortage and rising prices of oil resources, fuel economy is also a very important issue, thus prompting SSBR rapid development.