Manipulation of Poly(vinylidene fluoride) Polymorphism in PVDF/GO Nanocomposite during Melt Crystallization

摘要

Poly(vinylidene fluoride) (PVDF) can crystallize into at least four polymorphs (α,β,γ,and δ),its polar β and γ phases have pyroelectricity,piezoelectricity,and ferroelectricity,which give rise to many potential applications[1].Manipulating polymorphism of PVDF by mediating the polymer-GO interactions in PVDF/GO nanocomposite is important for the application of its promising properties as well as understanding of different strength interactions on the crystallization process of PVDF.In this work,we used wide-angle X-ray diffraction (WAXD) and Fourier Transformation Infrared Spectroscopy (FTIR) to investigate the crystalline structure of solution and melt crystallization PVDF and it is shown that GO platelets induce formation of γ phase when crystallizing from solution,but only α phase forms from melt crystallization.