The replacement of polymers with long-time degradation for biodegradable polymers is challenging due to economic factors and properties that do not attend the requirements for certain applications. Thus, the combinations of additives to these polymers such as poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), consists in an effective way of adjusting their properties and expand their uses. For this reason, a polymeric nanocomposite of PHBV combined with 0.5 and 1.0 (wt%) of multi-walled carbon nanotubes (MWCNT) and 5.0 (wt%) of tributyrin as plasticizer is achieved. The samples were produced by extrusion followed by press moulding under pressure and temperature. Mechanical properties were evaluated by tensile testing and the plasticization was verified by exudation testing. At the condition of 50 °C, 7 weeks was necessary to the mass loss stabilize after tributyrin exudation. Tensile
strength decreased on the nanocomposites of 1.0 (wt%) MWCNT with plasticization of 5.0 (wt%) tributyrin, while tensile modules and elongation at break did not vary significantly by plasticization on both compositions.