Quaternary (liquid+liquid) equilibria of aqueous two-phase poly (ethylene glycol), poly (DMAM–TBAM), and KH2PO4: Experimental and generalized Flory–Huggins theory

Densities and Speeds of Sound of Solutions of Glycine, l-Alanine, and l-Valine in Aqueous Ammonium Dihydrogen Phosphate at Different Temperatures

“…Ample research − has been carried out on thermodynamic properties of amino acids in aqueous electrolyte solutions, carbohydrates, surfactants, etc. but the phosphates salts are still found in limited study. − The phosphates are biologically and industrially important salts which are employed in food, cosmetics, and pharmaceutical industries and also in numerous biochemical studies. − The present work is just a continuation of our earlier laboratory work on the volumetric and ultrasonic properties of amino acids and peptides with phosphate salts of biological importance. − To explore more on phosphate salts, we hereby delineate the densities and speeds of sound of glycine, l -alanine and l -valine in aqueous ammonium dihydrogen phosphate (ADP) solutions at different temperatures (288.15, 298.15, 308.15, and 318.15) K and atmospheric pressure.…”

Phase Separation of Mixed Micelles and Synthesis of Hierarchical Porous Materials

“…The Flory–Huggins theory, , which takes account of the great dissimilarity in molecular sizes, has been widely applied in polymer systems. Especially, for blends of polymers, it can successfully predict the phase separation behavior. − The surfactant molecules, with hydrophilic heads and long hydrophobic tails, are somehow similar to the polymer molecules, while some nonionic surfactants are actually real polymer molecules. The Flory–Huggins theory considers the contribution of combination entropy attributed to the arrangement of the surfactant molecules during the mixing process.…”