SBR | Tennant Rubber

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SBR is a synthetic rubber with excellent abrasion resistant properties. Being a cost effective compound, many rubber components are made using SBR as the primary compound or at least in combination with other compounds.
SBR remains a staple in the rubber industry due to its balanced performance in abrasion and aging resistance, cost-effectiveness, and versatility in processing and applications. It's particularly prominent in tire manufacturing but also sees a wide range of uses in other industries where a robust, durable rubber is needed.

SBR is a copolymer, meaning it is synthesized from two monomers: styrene and butadiene. The typical composition involves about 25% styrene and 75% butadiene, though this ratio can vary depending on the desired properties of the rubber.

Butadiene (C4H6): Provides elasticity and resilience, which are key properties for rubber.
Styrene (C8H8): Contributes to the polymer’s hardness and strength, helping to enhance its wear resistance and aging properties.

These monomers are polymerized using an emulsion process, resulting in a random copolymer that exhibits both the properties of the individual monomers:

Random Copolymer Structure: This structure gives SBR good abrasion resistance and load-bearing characteristics, which are desirable in many commercial applications.

Properties and Applications
SBR is known for its excellent abrasion resistance, which makes it ideal for use in tires, where wear resistance is crucial. Other properties include:

Mechanical Properties: Good resilience and high tensile strength.
Thermal Properties: SBR can handle moderate temperatures but generally performs poorly in extreme cold or heat compared to other synthetic rubbers.
Chemical Resistance: Resistant to many hydrocarbons, acids, and alkalis, though it performs poorly with oils and fuels compared to NBR.

History of Styrene-Butadiene Rubber (SBR)
Styrene-Butadiene Rubber, commonly abbreviated as SBR, is a synthetic rubber that was developed as an alternative to natural rubber before World War II. The development was motivated by the search for materials with consistent quality and lower cost, further spurred by rubber shortages during the war. SBR was first produced in Germany during the 1930s under the name Buna S, where "Buna" was derived from butadiene, one of its components, and the "S" stood for Styrene.

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