Molecular Interactions in the Ethyl-cyanoethyl Cellulose/Dichloroacetic Acid Solution

Abstract

The molecular interactions in the ethyl-cyanoethyl cellulose/dichloroacetic acid solution are studied by Fourier transform infrared spectroscopy (FTIR). It is found that the molecular interactions are related to the structures of the solution. The formation and destruction of hydrogen bonds during the transition between isotropic and anisotropic phases greatly affects the displacement of the IR bands. In the mesophase, the solvent molecules prefer the head-to-end state. There is another critical concentration above C ⁺ ₂ in the solution, over which the structure of the solution is nearly unchangeable and the infrared absorption bands of the various groups do not shift with concentration.