Compared to PPC15, PPC10 film exhibited a similar temperaturedependent variation in SAXS profiles (Figure ), but slightly higher thermal stability of the phase separation. The SAXS patterns, corresponding to BCC phase, of PPC10 film at 45 and 55 o C are essentially similar to that at 30 o C. The three diffraction peaks at q = 0.15,0.23 and 0.26 Å -1 disappeared after the film was further heated to 65 o C. (Figure ) The WAXS profiles of PPC10 films at different temperatures (Figure ) show that the intensity of the multiple scattering spikes corresponding to lamellae of crystalline PCL became obviously weaker at 45 o C and completely disappeared at 55 and 65 o C at which the polymer completely melted.