PHYSICOCHEMICAL METHODS OF RESEARCH OF GUANIIDIN CELLULOSE

Background. The high practical value of cationic polyelectrolytes makes it necessary to study their structural features, molecular parameters, and physicochemical properties. Important characteristics such as molecular weight, thermal stability, supramolecular structure, solubility, and рКа value of cationic polymers not only determine their practical importance in various industries, but also provide them with the necessary biological activity. Purpose. To determine the supramolecular structure, thermal stability, molecular parameters, and the рКа, value of guanidine-containing cellulose derivatives through physicochemical methods. Methodology. The supramolecular structure of the samples was studied through X-ray diffraction and electron microscopy, and the value of рКа, was found by inverse titration. Molecular weight characteristics of cellulose guanidine were determined by the method of ELC on the liquid chromatograph. Thermoanalytical studies were carried out using thermogravimetric analysis and differential scanning calorimetry. Originality. For the first time the paper contains data covering reaserch of such characteristics as supramolecular structure, average molecular weight, thermal stability, and рКа value of guanidine-containing cellulose derivatives, which by properties refer to cationic polymers. Findings. Supramolecular structure, molecular parameters, thermal stability, and the value of рКа guanidine cellulose were derived through physicochemical methods. Highlight: - the properties of guanidine cellulose were studied by physicochemical methods; - supramolecular structure, thermal stability, molecular weight, and рКа of guanidine cellulose were determined.