OS0515 ポリマーブレンドの力学特性に関するメゾスケールシミュレーション(微視構造を有する材料の変形と破壊,オーガナイズドセッション)

概要

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In the paper, deformation of two-phase polymer blends were analyzed by mesoscale simulation based on molecular dynamics to obtain relation between mechanical properties and higher order structures of the polymer blends. To express higher order structures in the analysis, the models were microstructures of two polymer phases with different molecular-chain lengths; unit cells including cylindrical phase, laminated unit cells, randomly distributed cells having different mixture ratios of the two components. Tensile stress-strain curves of the models until breaking were evaluated by using software OCTA. As the results, strain energy density of each cell model until breaking was shown. The strain energy densities were strongly dependent on not only the mixture ratios but also the microstructures, since initiations of the breaking were determined by the microstructures. Therefore, mechanical properties can be improved by designing higher order structures of polymer blends.
2009-07-24