Relaxation transitions and compatibility of binary blended PVDF/PVB systems

In this paper we investigated local molecular dynamics and relaxation transitions of PVDF/PVB blended systems with different compositions. The temperatures of relaxation transitions of these systems were determined by the conformationally-inhomogeneous probes method and compared with that for pure PVDF and PVB. The relaxation transitions in the blended systems under investigation were assigned to the types of local molecular mobility of polymer chains. It was shown that PVDF/PVB blended systems were fully compatible when PVB content was not above 40%. The degree of crystallinity of PVDF/PVB blended systems was determined by FTIR spectra.