Synthesis and kinetic study of diacrylate and dimethacrylate

摘要

A recently developed successful approach to achieve the balanced properties involves the copolymerization of film forming monomers like acrylate and methacrylates with crosslinkable monomers. The crosslinker used in the copolymerization of acrylates are basically compound with at least two non-conjugated ethylenic double bonds in their molecule. The kinetics of esterification of multifunctional monomers were investigated using poly(propylene glycol) diacrylates. The effect of methyl group on reaction kinetics was investigated. The diacrylate / dimethacrylate based on polypropylene glycol (molecular weight 400) were synthesized by reacting with acrylic / methacrylic acid in presence of a catalyst. The decrease in acid value and the presence of prominent peak, –C = O stretching, at 1,731 cm−1 showed the formation of diacrylate and dimethacrylate. The value of rate constant for PPGDA at all temperatures were higher than that for PPGDA, indicating that the reactivity of PPG towards acrylic acid is more than methacrylic acid.