Curing Reaction of A Novel Multifunctional Hybrid Oligomer

A novel multifunctional hybrid oligomer(MEVO)containing both epoxy and vinyl ester group was synthesized using N,N,N′,N′-tetraglycidyl-4,4′-diaminodiphenyl methane(TGDDM)and acrylic acid(AA)as raw materials.Three curing systems,MEVO-MEKP,MEVO-MeTHPA and MEVO-MEKPMeTHPA were prepared by blending MEVO with the initiator methyl ethyl ketone peroxide(MEKP),and the epoxy curing agent methyl tetrahydrophthalic anhydride(MeTHPA).The curing reaction was investigated by nonisothermal DSC and FT-IR.Reaction apparent activation energy of each system were calculated.Results showed that vinyl ester cured by free radical polymerization mechanism and had no effect on epoxy group in MEVO-MEKP.Vinyl ester thermal cured in the process of epoxy curing in MEVO-MeTHPA.Vinyl ester and epoxy group cured according to respective mechanism and influenced each other in MEVOMEKP-MeTHPA.