THERMAL-ANALYSIS OF POWDER CELLULOSES MODIFIED BY LEWIS-ACIDS

The results of researches devoted to thermal degradation of powder cel luloses (PC) modified by Lewis acids (Lh) are presented. The effect of LA on tile changes of some kinetic parameters of the studied samples, namely on their thermal stability, decomposition rate, apparent activ ation energy, reaction order and others have seen studied. It was show n that, in spite of a lower crystallinity, compared to that of microcr ystalline cellulose (MCC), lower polymerization degree, the presence o f oxidized groups, low molecular water-soluble compounds and a relativ ely high content of ash elements, the thermal resistance of powders, o btained under the influence of LA, is practically the same as the resi stance of initial cellulose.