INFLUENCE OF THE LOCATION OF SULPHATE GROUPS IN CELLULOSE SULPHATES ON STABILITY OF THEIR MACROMOLECULE
Нормахаматов, Нодирали Сохобаталиевич
Чуркина, Ксения Михайловна
Тураев, Аббасхан Сабирханович
- Publisher: Altai State University
Khimiia rastitel'nogo syr'ia (Chemistry of plant raw material)
(issn: 1029-5143, eissn: 1029-5151)
sodium cellulose sulfate, location of the substituted patterns, macromolecular stability, thermogravimetry. | натриевая соль сульфата целлюлозы, расположение замещенных групп, стабильность макромолекулы, термогравиметрия.
Obtaining of sulfuric ester samples with various molecular parameters from cotton cellulose and influence of the location of sulphate groups in anhydroglucopyranose units on their stability were presented in the article. The changes of molecular characteristics took place during one year storage of aqueous solution of the samples and thermo-gravimetrical analyses of their dry form have been studied. The results showed the samples with highly substitution degree by sulfate groups were more stable and most samples with substituted groups in 3rd OH-position showed the weakest stability. It was assumed that the non-substituted trans- hydroxyl groups in the anhydroglucopyranose unit could supposedly be responsible for the instability.