| 초록 |
Butyl rubber (isobutylene isoprene rubber, IIR), a copolymer composed primarily of isobutylene with small percentages of isoprene, exhibits many favorable properties including excellent impermeability to water and gases, high chemical stability, high damping, and high elasticity. Rubber process oils help in improving the dispersion of fillers and flow characteristics of the rubber compound during further processing. For a rubber containing largely saturated groups, such as IIR, paraffinic process oils are conventionally used. However, as paraffinic oils generally contains at least 15 wt % aromatic contents, there can be compatibility issues with IIR. Herein, we report that preparation and characterization of dimer acid alkyl esters (DAAEs) through esterification of various alcohols and dimer acid derived from waste oils and fats. IIR was formulated with DAAE of 7.4 wt %. The flex durability of the butyl rubber composites was determined by DeMattia Flex Cracking (D.M.F.C.) Tester. |
