ACOUSTIC RELAXATION OF AQUEOUS-SOLUTIONS OF ETHOXYLATED DIISONONYLPHENOLS

被引：0

作者：

GUSHCHA, TO ^{[1
]}

POP, GS ^{[1
]}

SPERKACH, VS ^{[1
]}

机构：

[1] T G SHEVCHENKO KIEV STATE UNIV,KIEV,UKRAINE

来源：

COLLOID JOURNAL OF THE RUSSIAN ACADEMY OF SCIENCES | 1993年 / 55卷 / 05期

关键词：

D O I：

暂无

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The results of measurements of the acoustic spectra of aqueous solutions of a series of ethoxylated diisononylphenols in the 5-1200 MHz frequency range and 283-333 K temperature range are reported. It was shown that the fast kinetics of these systems cannot be represented by simple monomer- micelle exchange. It was found that several relaxation processes contribute to the excess absorption of sound in these systems. One of them, with a relaxation time of 10(-8) sec, is due to rotational isomerism transformations in ethoxy chains. The difference in the enthalpies of the conformers ranges from 36.8 to 40.2 kJ/mole. The kinetic and thermodynamic characteristics of this process were calculated. The conformational structure of ethoxylated SF in aqueous solutions was discussed.

引用

页码：662 / 668

页数：7