Crystallization of a salt of a weal organic acid and base: Solubility relations, supersaturation control and polymorphic behavior

Article Abstract:

A method for estimating the solubility product of a salt of a weak acid and weak base from measured pH-solubility data is described. A detailed study of the effects of pH, supersaturation, and temperature of crystallization on the physical properties of this salt shows that the desired polymorph may be produced by appropriate selection of the pH and supersaturation of crystallization.

Hydrogen-ion concentration, pH

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Long-range proton transfer in aqueous acid-base reactions

Article Abstract:

The mechanism of proton transfer (PT) in the aqueous acid-base reaction between the photoacid 8-hydroxy-1,3,6-pyrenetrisulfonic acid (HPTS) and acetate is studied. The transfer mechanism is described in terms of the adiabatic PT picture, where solvent fluctuations have played a key role in forming the correct hydrogen-bond configuration and solvent polarization to facilitate PT.

Measurement, Chemical equilibrium

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A distribution kinetics approach for crystallization of polymer blends

Article Abstract:

The cluster distribution approach is extended to investigate the crystallization kinetics of miscible polymer blends that accounts for the effects of polymer blending on nucleation and crystal growth rates. Adding a second polymer influences the crystallization mainly through thermodynamics and kinetics, equilibrium solubility and deposition mechanism.

Plastics Material and Resin Manufacturing, Plastics materials and resins, Polyvinylidene Chloride, Thermal properties, Thermodynamics, Nucleation, Nucleation (Chemistry), Solubility, Properties, Structure

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