Crystallization-induced interconnected structure in semicrystallizable polyester/polyether binary blends

摘要

The viscosity of binary blends containing one crystallizable component has been analyzed. The elastic moduli of these phase-separated blends exhibit extremely interesting discontinuities as a function of the overall sample composition. These abrupt changes cannot be attributed to the volume fraction of the crystallizable polyester-rich domains but rather to the extremely small amount (similar to 2% polyester) of unusual needle-shaped crystallites in the polyester-poor regions and interactions between domains and matrix. Therefore, the overall mechanical property of the binary blend must be considered in terms of the volume fraction of the polyester-rich domains interconnected by these unusual polyester-poor regions.