Abstract
In this study, we have reported the influence of graphene concentration on the vibrational properties of poly(vinyl alcohol) (PVA)-graphene composites formed at room temperature (300 K). Following the physicochemical characterization of the PVA-graphene composites were analyzed by powder X-ray diffraction (XRD), Fourier transform-infrared (FTIR) spectroscopy, and Field emission scanning electron microscopy (FESEM) analysis. Besides, PVA-graphene composites were tested for the intermolecular interactions, including the ultrasonic speed, intermolecular free length, density, and the impedance of double blends. Also, the adiabatic compressibility, acoustic impedance, intermolecular free length, and Gibbs vitality properties were determined to evaluate the cooperation between PVA and graphene in the composite. From the overall analysis of results, it can be indicated that the increased concentration of graphene is bringing changes to the PVA polymer structure and so associated deviations are observed in terms of density, viscosity, acoustical parameters, ultrasonic velocity, and intermolecular free length.
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