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- W2017658085 abstract "The diffusion coefficients of polystyrene (PS) in decahydronaphthalene (DHN) and in solutions of carbon dioxide (CO2) and DHN were measured for dilute PS solutions over a range of temperatures and CO2–DHN ratios using high pressure dynamic light scattering. Infinite dilution diffusion coefficients (D0) of PS and dynamic second virial coefficients (kD) were determined for essentially monodisperse 308 kDa PS. At a system pressure of 20.7 MPa, PS diffusion coefficients increased by a factor of 2.5, and the activation energy of diffusion decreased by approximately 16% when DHN was “expanded” with 44 mol% CO2. However, the hydrodynamic radius of PS at a given temperature was not particularly sensitive to the CO2 concentration. Solvent quality, as measured by kD, decreased at higher CO2 concentrations. The addition of CO2 to polymer solutions may offer a way to “tune” the properties of the solution to facilitate the heterogeneous catalytic hydrogenation of polymers." @default.
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- W2017658085 date "2009-11-01" @default.
- W2017658085 modified "2023-10-14" @default.
- W2017658085 title "Determination of polystyrene–carbon dioxide–decahydronaphthalene solution properties by high pressure dynamic light scattering" @default.
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- W2017658085 doi "https://doi.org/10.1016/j.polymer.2009.09.069" @default.
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