Degradation and crosslinking of dextran in aqueous solutions by gamma-radiolysis: The role of degree of polymerization

Authors
Kovalev, GV Sinitsyn, AP Bugaenko, LT
Citation
Gv. Kovalev et al., Degradation and crosslinking of dextran in aqueous solutions by gamma-radiolysis: The role of degree of polymerization, HIGH ENERG, 33(4), 1999, pp. 213-217
Citations number
8
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
HIGH ENERGY CHEMISTRY
ISSN journal
00181439 → ACNP
Volume
33
Issue
4
Year of publication
1999
Pages
213 - 217
Database
ISI
SICI code
0018-1439(199907/08)33:4<213:DACODI>2.0.ZU;2-D
Abstract
Changes in the molecular-weight distribution of dextran macromolecules upon gamma-irradiation of dilute aqueous solutions of this polysaccharide (20 g /dm(3)) in the dose range 0-0.26 MGy were examined using viscometry and gel permeation chromatography. The molecular-weight distribution of dextran ch anged in the course of irradiation as a result of both degradation and cros slinking of macrochains: the longer the macrochains, the more profound the degradation. The role of the transient products of water radiolysis in the formation of the products of both degradation and crosslinking of the macro chains was found.