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Temperature dependence of volume changes on glycine-PEG and L-alanine-PEG in aqueous solution

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Abstract

The volume changes on mixing aqueous solutions of glycine-PEG and L-alanine-PEG were respectively measured with a vibration densimeter as functions of concentration and temperature. The volume changes (Δ m)V for the glucine-PEG-H2O system were positive, and these φv(x,m) values of different total molality almost linearly decreased with an increase in temperature and converged around 110°C by extrapolation. On the other hand, those for the L-alanine-PEG-H2O system were almost zero and independent of temperature. It is considered that the influence of hydration cospheres on glycine-PEG interaction for the glycine-PEG-H2O system disappears around 110°C.

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  1. Research Laboratory Fujinomiya, Fuji Photo Film Co., Ltd, 200 Ohnakazato, 418, Fujinomiya Shizuoka, Japan

    K. Sasahara

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  1. K. Sasahara
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Sasahara, K. Temperature dependence of volume changes on glycine-PEG and L-alanine-PEG in aqueous solution. Colloid Polym Sci 273, 782–786 (1995). https://doi.org/10.1007/BF00658757

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  • DOI: https://doi.org/10.1007/BF00658757

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