Abstract
Total amorphization and formation of a trihydrophosphate complex precedes dissolution of cellulose in aqueous solution of H3PO4. With respect to absolutely dry polysaccharide, these conditions are attained in a large excess of 78.5 and 81.8% acids, respectively. The reaction of hydrated cellulose with 5-15% solutions of H3PO4 is accompanied by an increase in the molecular packing density, which attains the maximum value in 10% acid.
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