Study of aggregation in water—n-butoxyethanol solutions by dielectric relaxation measurements

✍ Scribed by D. Fioretto; A. Marini; G. Onori; L. Palmieri; A. Santucci; G. Socino; L. Verdini

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 458 KB
• Volume: 196
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(92)85998-p

✦ Synopsis

The dielectric relaxation of water-n-butoxyethanol mixtures has been studied as a function of alcohol concentration in the water-rich region by means of a frequency domain coaxial technique in the range 10 MHz-3 GHz. Both the static dielectric constant and dielectric relaxation time exhibit an anomalous behaviour which further supports the existence of a butoxyethanol microphase above a critical concentration (mole fraction of cosolvent X*=0.026 at T=2"C). Experimental data have been analyzed in terms of a simple model in which water molecules are divided in two main groups, hydration and bulk water, mutually exchanging at a finite rate.