On the Stable Coacervate
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概要
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The influence of ions in solution on the stability of coacervates is discussed. Assuming that positive and negative ions in coacervates have different potential energies due to interactions with solvent and solute molecules, i. e., that coacervates have ability of selective absorption of ions, the free energy of coacervates is derived as the function of their size. In ordinary solutions such selective absorption decreases the surface tension of coacervates and makes the phenomena of the microcoacervation observable. Under suitable conditions with respect to the absorption potentials, the concentration of ions, and the dielectric constant, it may be happened, in high-polymer solutions, that coacervates of a particular intermediate size are stabilized by the selective absorption. The simple mechanism proposed suggests the cause that stable coacervates of ten suspend in equilibrium at the phase separation of solutions.
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