Bromobutyl Vial Stoppers Vs Chlorobutyl Vial Stoppers
Serum vial stoppers are readily available in bromobutyl and chlorobutyl rubber formulations for use in pharmaceutical and biological packaging. During the vulcanization process of natural rubber (heating and curing), cross-linking of individual polymer chains forms copolymers of isobutylene, and to a lesser extent, isoprene. By incorporating a halogen (bromine or chlorine) in the vulcanization process, the rate of vulcanization blending and curing performance is improved, and the cross-link bonding property is also significantly enhanced. Each specific halogen offers its own unique characteristics to the finished product. Material Composition Bromobutyl Rubber: a terpolymer of isobutylene, isoprene, and brominated isoprene. Bromobutyl Vial Stoppers: Bromobutyl vial rubber is a copolymer of isobutylene and a small amount of isoprene, with bromine atoms added to the polymer chain. The bromination process enhances the barrier properties of the rubber, making it impermeable to gases