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- W2084097498 abstract "The behavior of aqueous solutions of poly(ethylene oxide) (PEO) is studied theoretically by applying a mean field-like approach which includes the effect of the competition of PEO and water as proton acceptors in hydrogen bond formation. Accounting for this effect is of crucial importance for a correct description of all solution properties. We calculate the temperature and concentration dependence of the average fraction of hydrogen bonds between PEO and water and find very good agreement between our predictions and experimental or MD simulation data. We also make predictions concerning the temperature behavior of the second virial coefficient A2 and the effective interaction parameter χeff and compare it with experimental data. We found that the decrease of A2 with temperature is caused by the delicate balance of the opposing effects of water−PEO and water−water hydrogen bonding. The phase diagram for PEO of different molecular weights in water is calculated using experimentally reported data for the energy and entropy of association. We achieved very good quantitative agreement with most of the experimental data reported, in particular reproducing the closed loop regions of phase coexistence. We also compare our findings with results of other theoretical models." @default.
- W2084097498 created "2016-06-24" @default.
- W2084097498 creator A5086446569 @default.
- W2084097498 date "2001-12-21" @default.
- W2084097498 modified "2023-10-01" @default.
- W2084097498 title "Role of Competitive PEO−Water and Water−Water Hydrogen Bonding in Aqueous Solution PEO Behavior" @default.
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- W2084097498 doi "https://doi.org/10.1021/ma010804e" @default.
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