Sodium, ferric and aluminum salts of oxycellulose and the amphoteric ion exchanger derivatives from cationized oxycellulose
were prepared. Thermal behaviour of the different samples was investigated by thermal gravimetric analysis (TG) and derivative
thermogravimetric (DTG) technique. The rate constant and the activation energy were estimated. Infrared spectroscopy of the
different samples were investigated, analyzed and discussed.
The effects of ageing for periods of one month and one year upon chemically preoxidized and radiation-sterilized oxycellulose were investigated. Changes in chemical structure and energetic excitation of atomic groups of the oxycellulose skeleton were evaluated from qualitative and quantitative aspects. Use was made of numerical interpretation of activation energy quantities, weight losses, the quantitative energetic quantity EW, and thermal effects (areas of DTA curve peaks) of individual degradation reactions, when applying the oxidation pyrolysis method with a Derivatograph.