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Thermomechanochemical depolymerization of dextrans in aqueous phase
Author(s) -
Carrasco F.,
Chornet E.,
Overend R. P.
Publication year - 1987
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.1987.070340113
Subject(s) - depolymerization , dextran , viscosity , aqueous solution , phase (matter) , flexibility (engineering) , polymer chemistry , chemical engineering , chemistry , aqueous two phase system , materials science , organic chemistry , composite material , statistics , mathematics , engineering
This article centers on the depolymerization of dextrans under the action of thermomechanical forces induced by rapid passage of concentrated dextran solutions through capillaries and homogenizing valves. Viscosity measurements combined with theoretical equations related to the properties of the dextran solutions led us to characterize the flexibility of dextrans chains in water. The influences of temperature and pressure gradient through the restrictions on the extent of depolymerization are described. The thermomechanical treatment is particularly effective in the presence of acid catalysts.