Investigation of the structure of aqueous solutions of 1,2-and 1,4-butanediol by positron annihilation and ultrasonic methods

The structure of aqueous solutions of 1,2-butanediol and 1,4-butanediol was investigated using adiabatic compressibility measurements and positron ann ihilation methods. in the case of 1,2-butanediol the experimental results a re very similar to those obtained earlier for systems where hydrophobic hyd ration dominates. In both cases there are evidences for increased rigidity of the water network, which arises from the formation of hydrogen bonds bet ween diols and water. The usefulness of both the methods applied in investi gating the structure of liquid solutions was proved.