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        Mechanical Behavior of PMMA/SiO2 Multilayer Nanocomposites: Experiments and Molecular Dynamics Simulation

        Xiangshi Zhen,Liyan Zhang,Meinong Shi,Li Li,Lisheng Cheng,Zhiwei Jiao,Weimin Yang,Yumei Ding 한국고분자학회 2020 Macromolecular Research Vol.28 No.3

        Poly(methyl methacrylate) (PMMA)/nano-silica (nano-SiO2) nanocomposite film with 256 layers containing different amounts of nano-SiO2 was manufactured by a new type of micro-nano multilayer co-extrusion technology. The structure, morphology and mechanical properties of PMMA/nano-SiO2 nanocomposite films were investigated through Fourier transform infrared spectroscopy (FTIR), scanning electron microscope (SEM) and tensile test. Besides, molecular dynamics simulation was adopted to study the dispersion and content effect on mechanical properties of PMMA/nano-SiO2 nanocomposite film. It is demonstrated that the tensile strength and the elongation at break of the composites improved with increasing nano-SiO2 content from 0 to 5 wt%, which was in good agreement with the Molecular Dynamics simulation. And the nanofiller dispersion in the multilayer nanocomposite film was better than that in the single-layer film with equivalent thickness under the effect of torsion lamination. Overall, the best performance was found for the nanocomposites of PMMA with nano-SiO2 content of 3.5 wt%.

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