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Abstract
Poly (vinylidene fluoride) (PVDF)/graphene composites were prepared through the melt blending method. The growths of PVDF spherulites in the composites at various temperatures were observed by means of polarized optical microscope (POM), and the melting behaviors were investigated with differential scanning calorimetry (DSC). The POM images showed that the spherulites morphology of PVDF in both pure PVDF and the composite samples presented the same well-defined Maltese-cross texture, and the radial growth rates of PVDF spherulites decreased with increasing crystallization temperature. Two equilibrium melting temperatures of PVDF were obtained and the equilibrium melting temperature of the samples crystallized above 160 °C was higher than that crystallized below 160 °C, which was attributed to the different crystal structures. Zero growth temperature of native PVDF spherulite was obtained according to the samples that crystallized above 160 °C. There is no obvious influence of adding graphene on the zero growth temperature of PVDF in the composites.
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