Enhancing Epoxy Resin Properties Through One-Step Modification withPolymeric MDI

This study explores the modification of epoxy resin adhesives using polymeric methylene diphenyldiisocyanate (PMDI) to improve their mechanical properties. PMDI was added to the epoxy resin atcertain concentrations by weight. The mechanical properties of the modified adhesives wereevaluated through pull-off tests. Results demonstrated that even incorporating low PMDIconcentration, significantly enhanced the mechanical properties of the adhesive, achieving a pull-offstrength of ۱۷۵۰ psi. However, increasing PMDI content resulted in a slight decrease in performance,followed by an increase to ۱۹۰۰ psi at highest PMDI concentration. Despite the mechanical benefitsobserved at higher PMDI levels, the adhesive samples exhibited undesirable agglomeration,indicating a compromise in the material's stability and uniformity. These findings suggest that whilePMDI can enhance adhesive performance, optimal concentration and formulation strategies arecritical to maintain desirable adhesive features

کلیدواژه ها:

Coating ، Polymeric methylene diphenyl diisocyanate ، Adhesive ، Mechanical properties