Morphology development and exclusion of noncrystalline polymer during crystallization in PVDF/PMMA blends

摘要: Abstract Morphology development during the crystallization of poly(vinylidene fluoride) (PVDF)/poly(methyl methacrylate) (PMMA) blends was investigated at various temperatures ( T C ) by means time-resolved light scattering measurements and atomic force microscopy (AFM). A coarse spherulite obtained a high 162 °C found to be developed with two-step process. The ordering in spherulites P r) increased time early stages then decreased later stages. rate growth started decrease when r decrease. In contrast, compact low 148 °C, monotonously while constant. AFM observation revealed that such characteristic behavior is attributed exclusion PMMA from crystal crystallization; i.e., amount excluded becomes larger as distance center increases temperature rises.