The addition of VMT to Ecobras matrix resulted in lower value of melt flow index (MFI), indicating that VMT restricts the chain mobility, raising the viscosity. On the other hand, the addition of P- VMT to Ecobras promoted a slight increase in MFI value when compared to pure Ecobras. We believe that phosphonium cation facilitated the mixing process due to its low molecular weight. The Young's modulus (E) of sample S3 was slightly higher after adding P-VMT when compared to pure Ecobras, probably by the reinfor- cing effect of P-VMT particles and the great affinity between the matrix and P-VMT.