espanolEn este trabajo se estudio la compatibilizacion con anhidrido maleico injertado en polietileno (MAPE) a mezclas inmiscibles de poli(acido lactico) y polietileno lineal de media densidad (PLA/PELMD) procesadas por moldeo rotacional. Previamente, los componentes se combinaron mediante simple mezclado en seco a diferentes relaciones de peso (100:0, 75:25, 50:50, 25:75 y 0:100) utilizando una licuadora industrial. Las piezas obtenidas por rotomoldeo se caracterizaron mediante microscopia electronica de barrido (SEM), propiedades termicas (DSC y TGA) y mecanicas (tension, flexion e impacto). Tras la adicion del MAPE se obtuvieron incrementos en los modulos de tension y flexion de hasta 29,7 y 33,2%, respectivamente, en comparacion con las mezclas sin compatibilizar. Por otra parte, se observo un efecto sinergico en la resistencia al impacto para las mezclas incluso sin la presencia de MAPE en la muestra. EnglishIn this work, the compatibilization effect of maleic anhydride grafted polyethylene (MAPE) in immiscible blends of poly(lactic acid) and linear medium density polyethylene (PLA/PELMD) processed by rotational molding was studied. Previously, the components were combined by simple dry-blending at different weight ratios (100:0, 75:25, 50:50, 25:75 and 0:100). The obtained pieces were characterized by scanning electron microscopy (SEM), as well as in terms of their thermal (DSC and TGA) and mechanical (tension, flexural and impact) properties. After MAPE addition, increases in tension and flexural modulus were obtained up to 29,7 and 33,2%, respectively, compared with the uncompatibilized blends. On the other hand, a synergistic effect in the impact strength for the blends was observed even without the presence of MAPE in the sample.