Properties of the blends of Poly(vinyl chloride) (PVC) and poly(e-caprolactone) (PCLO) and copolyesters based on e-caprolactone and L-lactide (LLA) prepared by rolling were studied. Incorporating the LLA units into the structure of PCLO the content of the crystalline phase was controlled. Miscibility of the blends was assessed using DMA, and basic mechanical properties were correlated with the type and content of the polymer plasticizer. The PVC blends containing up to 20 wt parts polyesters were miscible. The presence of the LLA units in the copolyester influenced negatively the thermal stability. On the other hand even small content of copolyester in the blend enhanced the resistivity against aging. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012