El reforzamiento de la mezcla de polimeros biodegradables poli(e-caprolactona)/polilactida, PCL/PLA 70/30 con nanotubos de carbon multi-pared, permite modificar y mejorar las propiedades mecanicas, dielectricas y electricas de esos nanocompuestos; las concentraciones en peso de NTC, p , estudiadas variaron de 0 a 4% y el rango de frecuencia de 10 -3 a 10 7 Hz y variando la temperatura de 143 a 313 K. La morfologia de la mezcla inmiscible es de tipo mar-isla y se pudo evidenciar que los NTC estan excluidos de la fase minoritaria, PLA, y que ademas se colocan selectivamente en las interfases. La variacion de la conductividad DC en funcion de p varia de 10 ordenes de magnitud a temperatura ambiente, evidenciando asi que existe un mecanismo de percolacion de los portadores de carga para una concentracion critica de 0.98% de NTC. Se determinaron los exponentes criticos, la existencia de tuneleo y la universalidad del comportamiento electrico de los nanocompuestos. The reinforcement of the blend poly(e-caprolactone)/polilactide, PCL/PLA, 70/30, with multiwall carbon nanotubes, leads to the improvement of the mechanical, dielectric and electrical properties of these nanocomposites; the CNT weight concentrations studied, p , ranged from 0 to 4% and the frequencies varied from 10 -3 to 10 7 Hz and temperatures from 143 up to 313 K. The sea-island morphology of the immiscible blend was observed together with the selective location of the CNT. The nanofiller was dispersed in the PCL phase, some of the CNT were selectively being located at the PLA interphase. The DC conductivity as a function of p varied 10 orders of magnitude at room temperature, thus evidencing the existence of a percolation mechanism for the charge carriers in the insulating matrix at a critical CNT concentration of 0.98%. The critical exponents, the tunneling among CNT not yet in physical contact, the behavior with temperature and the universality of the electrical behavior of the nanocomposites were also studied.