Vinyl12polybutadiene

Vinyl12polybutadiene, also known as high vinyl polybutadiene or 1,2-polybutadiene, is a synthetic polymer derived from butadiene monomers. Its unique structure, characterized by a high proportion of vinyl (1,2) linkages along the polymer backbone, distinguishes it from other forms of polybutadiene such as cis-1,4-polybutadiene and trans-1,4-polybutadiene. These vinyl linkages result in pendant double bonds that can be utilized for further chemical modification and crosslinking.

The synthesis of vinyl12polybutadiene typically involves anionic polymerization techniques, often employing organolithium initiators. The polymerization conditions, including temperature, solvent, and initiator concentration, can be carefully controlled to influence the microstructure, molecular weight, and polydispersity of the resulting polymer. A key aspect of its production is achieving a high vinyl content, which can range from 70% to over 90% depending on the desired properties.

Vinyl12polybutadiene exhibits distinct properties due to its molecular structure. The presence of pendant vinyl groups leads to a higher glass transition temperature (Tg) compared to its cis-1,4 isomer, contributing to improved hardness and stiffness. It also possesses good resilience and can be functionalized through reactions at the double bonds, allowing for the introduction of various chemical groups. This makes it a versatile material for applications requiring specific performance characteristics.

Applications for vinyl12polybutadiene include its use as a comonomer in the production of various elastomers and plastics, such as styrene-butadiene rubber (SBR) and acrylonitrile-butadiene-styrene (ABS) resins, where it can enhance impact resistance and processability. It also finds use in the formulation of adhesives, sealants, and coatings, and as a reactive component in the development of specialty polymers and advanced materials where its unique reactivity can be exploited.