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Effects of alkalinity on endwise depolymerization of hydrocellulose
Author(s) -
Lai YuanZong,
Ontto Donald E.
Publication year - 1979
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1979.070231107
Subject(s) - depolymerization , alkalinity , sodium hydroxide , degradation (telecommunications) , alkali metal , base (topology) , polymerization , chemistry , degree of polymerization , hydroxide , polymer chemistry , phase (matter) , sodium , inorganic chemistry , organic chemistry , polymer , mathematics , computer science , telecommunications , mathematical analysis
The role of hydroxyl ion concentration in the endwise depolymerization of hydrocellulose has been investigated in sodium hydroxide solution (0.05–18.6 N ) at 120°C, by determining the amount of degradation and the changes of carboxyl content and degree of polymerization in the solid phase. The extent of degradation increases with the base concentration up to about 6 N and then sharply decreases thereafter. These data are discussed in terms of altering the accessibility and the relative rates of peeling and stopping reactions in varying concentrations of alkali.