polybutadieenrubber

Polybutadiene rubber (PBR) is a synthetic elastomer derived from the polymerisation of the monomer 1,3‑butadiene. The resulting polymer consists of a random or semi‑regular arrangement of cis‑, trans‑, and vinyl units, giving it a highly flexible hydrocarbon backbone. Production typically employs anionic polymerisation in hydrocarbon solvents, using organolithium initiators and, in some processes, coordination catalysts to control microstructure and molecular weight.

The material is characterised by a low glass‑transition temperature (‑90 °C to ‑110 °C), high resilience, and excellent resistance to fatigue, wear and ozone. Its high tensile strength and low hysteresis make it suitable for dynamic applications, while its relatively low cost and ease of compounding further enhance its utility. Common additives include carbon black, silica, and various plasticisers to tailor properties such as hardness, abrasion resistance and processing behaviour.

Polybutadiene rubber finds extensive use in the automotive industry, notably in tire treads and inner liners, where it contributes to low rolling resistance and improved fuel efficiency. Other applications include golf balls, conveyor belts, footwear, and various molded or extruded components that demand high resilience. In combination with other elastomers, PBR forms blends that balance performance attributes, such as styrene‑butadiene rubber (SBR) blends used for specific tire designs.

Environmental and health considerations focus on the handling of residual butadiene monomer, a known carcinogen, and the management of polymer waste. Recycling methods such as devulcanisation and incorporation into reclaimed rubber products are increasingly employed to mitigate the material’s ecological impact.