This work deals with a dynamic mechanical analysis (DMA) study on the effect of a novel interfacial agent containing maleated grafts on an industrial waste origin atactic polypropylene. This contains 3% of bridge-, backbone-, and terminal-grafted succinic anhydride groups (aPP-SA/SA). By considering a polymer blend as a special case of composite where the dispersed phase is mobile, it is assumed that both the amounts of polyamide 6 (PA6) and the interfacial agent (aPP-SA/SA) cause changes in the glass transition temperature of the polypropylene phase in the blend. In this work, we have used DMA parameters to evidence the real interfacial modifications caused by the presence of aPP-SA/SA in the isotactic polypropylene (iPP)/PA6 system at the iPP glass transition temperature on the basis that this is an unfavorable scenario for the action of aPP-SA/SA. Since each component of the blend is interacting with each other, and to include the influence of the dispersed phase, it is possible to use a Box-Wilson experimental design model by resembling the so-called "agent based models" to obtain algorithms forecasting the dynamic mechanical parameters (storage, E', and loss moduli, E") at the glass transition of iPP, in all the composition range of whatever iPP/PA6/aPP-SA/SA-modified blend. (C) 2019 Society of Plastics Engineers.