Formation of interpenetrated spherulites based on miscible crystalline polymer blends

The morphology and formation process of interpenetrated spherulites of poly (butylene succinate)/poly(vinylidene choloride-co-vinyl chloride) (PBSU/PVD CVC) blends were investigated by confocal laser scanning microscopy (CLSM). CLSM images showed that the dense fibrils of PBSU spherulites penetrated i nto the sparse PVDCVC spherulites. For a blend with PBSU content 50% and cr ystallization temperature T-c = 368 K, the simultaneous growth of PBSU and PVDCVC spherulites was observed. After PBSU fibrils collided with PVDCVC sp herulites, they kept growing through PVDCVC spherulites. For a blend with P BSU content 30% and T-c = 363 K, PBSU started to nucleate after PVDCVC sphe rulites filled the whole space.