Lyashok I. Mechanism of change of a degree of polymerization and molecular-weight distribution at prematuration alkaline cellulose in viscose production

The dissertation is devoted to research of the mechanism of change of a degree of polymerization and molecular -weight distribution at prematuration alkaline cellulose in viscose manufacture by a method of Monte Carlo. It is shown, that change of the joint venture of alkaline cellulose in conditions of prematuration passes at parallel course of two processes in amorphous sites: 1) destruction by chance and 2) depolymerization from a chain end. It is shown, that molecular -weight distribution on Flori and logarithm-normal distribution on the joint venture are adequate within the limits of an error of statistical criteria of concurrence of two distributions. Alternative technological circuits of preparation of cellulose to csantogenation are offered, allowing to change quantity(amount) gemicellulose and character of a curve of distribution on the joint venture.