The miscibility of polyvinyl alcohol (PVA)/polyvinyl pyrrolidone (PVP) blends is investigated by atomistic molecular dynamics (MD). Specific volumes of five PVA/PVP blends (with mass ratio (ω, ω = mPVA/mPVP) at 25%, 50%, 100%, 200% and 400%) as well as pure PVA and PVP are reviewed at the temperature of 298 K. The Flory–Huggins parameter
determined from the cohesive energy densities and the radial distribution functions of the inter-molecular atoms suggest that PVA/PVP blends can be miscible at all sample. This is further supported by the morphologies of PVA/PVP blends. Then the phase separation kinetics of PVA/PVP blends was examined using density profiles calculated from the MesoDyn approach to examine mesoscopic morphology of the blends, and the result strengthening the view that the blends can be miscible with any sample mass fraction by the enthalpy contributions of H-bonds.
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determined from the cohesive energy densities and the radial distribution functions of the inter-molecular atoms suggest that PVA/PVP blends can be miscible at all sample. This is further supported by the morphologies of PVA/PVP blends. Then the phase separation kinetics of PVA/PVP blends was examined using density profiles calculated from the MesoDyn approach to examine mesoscopic morphology of the blends, and the result strengthening the view that the blends can be miscible with any sample mass fraction by the enthalpy contributions of H-bonds.