Investigation of the mechanical and thermal properties of reactive AAEM-co-MMA adhesive

The effect of acetoacetoxyethyl methacrylate (AAEM) comonomer was investigated on the adhesion and thermal and mechanical properties of methyl methacrylate (MMA) reactive adhesive. The free radical bulk copolymerization of AAEM-co-MMA at ambient temperature was carried out in the presence of redox couple of benzoyl peroxide (BPO) and N,N-dimethylaniline (DMA). The glass transition temperature (T-g) and Young's modulus of different AAEM comonomer compositions were investigated by dynamic mechanical thermal analysis (DMTA) and three-point bending test. The presence of AAEM comonomer resulted in a lowT(g)and high modulus adhesive. The results from tensile test and lap shear strength showed the usefulness of AAEM in MMA adhesive with an optimum AAEM contribution of 20 wt.%. The improvements in adhesive main properties and thermal stability may be well attributed to the formation of cross-linking bonds which is in agreement with the results of FTIR spectroscopy.