Some common conductive polymers are polyfuran, polyacetylene, polythiophene, and Polypyrrole. Since their discovery, many have been exploring and evaluating their conductive and electronic properties. Various applications have been developed for conductive materials. Their biocompatibility offers a new alternative for studying and solving complex problems, such as cellular activity, or, more recently, for use as neural implants and as an alternative to spinal cord regenerative tissue. This is particularly true for the use of Polypyrrole. The main obstacle lies in estimating some of the mechanical properties, specifically Young’s modulus values, for Polypyrrole, as these vary depending on the type of synthesis used. For this reason, this article presents a composite methodology for characterizing the elastic modulus in accordance with ASTM D882 standards. It is specifically designed for 3D composite samples involving PLA and PPy, where the Polypyrrole was processed by plasma oxidation. As a result, the elasticity modulus for PPPy is 326.85 MPa, which is a difference of at least 100 MPa compared to the values reported in the chemical synthesis bibliography.