We investigated the dielectric properties of crystalline poly(vinylidene fluoride) (PVDF)/poly(methyl methacrylate) (PMMA) blends in a wide range of frequency f at various temperatures T. A large peak of the dielectric loss e"(f) due to the interfacial polarization was found in the blend below the frequency region of the ~c process. Such a peak was not observed in neat PVDF. The difference may be ascribed to the existence of a large amount of PMMA at the crystal-amorphous interphase in the blend. We also demonstrated that a low Tpeak in e"(T), which was thought of as an interfacial peak, is not related to the cta process of PVDF in the interphase, but to the fl process of PVDF.
Посилання на статтю:
Dielectric study of the crystal-amorphous interphase in poly(vinylidene fluoride)/poly(methyl methacrylate) blends / Hiromu Saito and Bernd Stuhn // Polymer. – 1994. – Vol 35. – P. 475-479.