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- W2028890693 abstract "Ultrasonic absorption coefficients were measured in aqueous solutions of propylamine at 25 °C in both the absence and presence of 2.01 g dm-3 (poly(vinyl alcohols) (PVA’s)) with the number average degree of polymerization of 500, 900, 1500, and 2000. No excess absorption was observed in solutions without propylamine. A single relaxational absorption was observed in the concentration range from 0.0241 to 0.201 mol dm-3 of propylamine in both the presence and absence of PVA’s. The relaxational absorption was attributed to a perturbation of the equilibrium associated with a proton-transfer reaction from the concentration dependence of the relaxation frequency and the maximum absorption per wavelength. The rate and equilibrium constants and the standard volume change of the reaction were determined in individual solutions with PVA’s. As a result, it was found that the diffusion-controlled reaction rate constant remains constant, or increases slightly, even though the solution viscosity increases. The effect o..." @default.
- W2028890693 created "2016-06-24" @default.
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- W2028890693 date "2002-07-01" @default.
- W2028890693 modified "2023-09-26" @default.
- W2028890693 title "Proton-Transfer Reaction in Aqueous Propylamine Solution with Poly(vinyl alcohols) by Ultrasonic Absorption Method" @default.
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- W2028890693 doi "https://doi.org/10.1246/bcsj.75.1461" @default.
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