Se realizo la caracterizacion termica de varios homopolimeros de Policaprolactona ciclica y lineal. Se realizaron corridas estandar de calorimetria diferencial de barrido y cristalizaciones isotermicas. Las transiciones termicas de las PCL ciclicas ocurrieron a valores mucho mayores que en las lineales de igual peso molecular, la cinetica de cristalizacion aumento con el peso molecular del homopolimero y con respecto a las PCL lineales presento una diferencia considerable. Existe un efecto importante en los polimeros ciclicos que, al no poseer extremos de cadena, sus enredos de cadena y por tanto su viscosidad se ve reducida considerablemente, aumentando su cinetica de cristalizacion y finalmente permitiendo mayor facilidad para promover cristales mucho mas estable. In this work, we present the thermal characterization of homopolymers of cyclic and linear Polycaprolactone. Standard differential scanning calorimetry and isothermal crystallization were made. The crystallization and melting temperatures of cyclic PCL occurred values much higher than in linear PCL at same molecular weight, kinetics of crystallization increased with molecular weight homopolymer and with respect to linear PCL present a considerable difference. There is a significant effect on cyclic polymers, not having chain ends, its entanglements and therefore its viscosity is reduced significantly, increasing the crystallization kinetics, promoting thicker crystals.