The basics of cellulose dissolution and the factors influencing dissolution of pulps are introduced. The influence of derivatizing systems on cellulose was studied. Carbamation of celluloses by isocyanates in DMSO will cause some degradation of cellulose. Several approaches to improve cellulose solubility in the DMAc/LiCl system are discussed, including several pre-treatments, and recommendations are given for which type of pulp samples the specific pre-treatment is appropriate.
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