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Poly(vinyl alcohol)/graphene oxide (PVA/GO) composites were studied by molecular mechanics and molecular dynamics methods to analyze the effect of GO sheet addition on PVA material. The properties of polymer/GO composites with different oxidation degrees and dispersion states of GO sheets in a PVA matrix were compared. The interfacial binding characteristics, mechanical properties, and glass transition temperature of PVA/GO composites were obtained. It was found that the oxidation degree of the GO sheet would influence the strength of interfacial binding characteristics between the polymer and GO sheet. A high oxidation degree of GO would enhance the interaction between the GO sheet and PVA matrix, thus improving the properties of PVA/GO composites. By reinforcing pure PVA with GO to give PVA/GO composites, its Young’s modulus, bulk modulus, and shear modulus, as well as the glass transition temperature of the PVA/GO composites, were obviously enhanced. For GO paper, the interaction between GO sheets inside the GO paper was stronger than the interaction between the GO paper and PVA matrix.
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Ding et al. (2012) studied this question.
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