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- W2047944905 abstract "Abstract Limiting viscosity numbers ([ν]) and Schulz-Blaschke constants ( k s ) of PMMA samples (differing in molecular weight) have been determined at 25°C (as a function of mixed solvent composition) for the following mixtures: acetonitrile+1-butanol, acetonitrile+pentyl acetate, and 1-chlorobutane+pentyl acetate. The first two mixtures are powerful cosolvents of PMMA and the third one is a ‘co-nonsolvent’ of the polymer. The samples are predominantly heterotactic. Their k s values at θ indicate some association tendency of the polymer. Unperturbed dimensions and coil expansion coefficients have been obtained from [ν], as a function of solvent mixture composition. All the pure liquids are poor or non-solvents of PMMA (at 25°C), but the cosolvent pairs behave as very good solvents for the polymer. The mechanism of such cosolvency is analysed in terms of the different molecular interactions present in these systems." @default.
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- W2047944905 date "1984-09-01" @default.
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- W2047944905 title "Cosolvency, coil expansion and dimensions of PMMA in mixed solvents" @default.
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- W2047944905 doi "https://doi.org/10.1016/0032-3861(84)90381-1" @default.
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