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- W4281727059 startingPage "125044" @default.
- W4281727059 abstract "Glass transition is an intensively studied topic but many questions in this regard remain unaddressed. This is an important phenomenon related to the physical and mechanical properties of amorphous polymer materials. In this study, existing and newly performed all-atomistic molecular dynamics (MD) simulations of polycarbonate (PC) and poly-(methyl methacrylate) (PMMA) cooling processes were analyzed to address their glass transitions from a molecular perspective. Additionally, potential energy, radius of gyration, dihedral transition, and end effects were characterized. Further analyses were performed to characterize the individual degrees of freedom (DoFs) by the variance, correlation between two DoFs by the correlation coefficient, and collective motions by instantaneous normal mode (INM) analysis. Various DoFs experienced glass transition at temperatures slightly different from the glass transition temperature Tg, presumably owing to their different spatial scales and chemical environments. This suggests that the experimentally observed broad Tg may be attributed to a similar hierarchy of motions. Collective motions characterized by INM revealed slightly different behaviors for PC and PMMA." @default.
- W4281727059 created "2022-06-13" @default.
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- W4281727059 date "2022-07-01" @default.
- W4281727059 modified "2023-10-01" @default.
- W4281727059 title "All-atomistic molecular dynamics study of the glass transition of amorphous polymers" @default.
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- W4281727059 doi "https://doi.org/10.1016/j.polymer.2022.125044" @default.
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