Effects of crystallization condition of poly(butylene succinate) component on the crystallization of poly(ethylene oxide) component in their miscible blends

The crystallization behavior of the poly(ethylene oxide) (PEO) component in poly(butylene succinate) (PBS)/PEO blends with the middle PEO content was investigated as a function of isothermal crystallization temperature of the PBS component (T-IC,T-PBS) using differential scanning calorimetry (DSC). It is found that the crystallization behavior of the PEO component in these blends is significantly affected by Tic,PBS. Small-angle X-ray diffraction (SAXS) measurements were performed to explore the origin of the T-IC,T-PBS dependence of crystallization of PEO component. On the basis of the SAXS measurements and the results of our previous work [Macromolecules 2004, 37, 3337-3345], it is suggested that Tic,PBS controls the location distribution of the PEO component in the blends after the crystallization of the PBS component and thus significantly affects the crystallization behavior of PEO.