Degradation and crosslinking of dextran in aqueous solutions by gamma-radiolysis: The effect of polymer concentration

Authors
Kovalev, GV Sinitsyn, AP Bugaenko, LT
Citation
Gv. Kovalev et al., Degradation and crosslinking of dextran in aqueous solutions by gamma-radiolysis: The effect of polymer concentration, HIGH ENERG, 33(6), 1999, pp. 370-373
Citations number
5
Categorie Soggetti
Physical Chemistry/Chemical Physics
Journal title
HIGH ENERGY CHEMISTRY
ISSN journal
00181439 → ACNP
Volume
33
Issue
6
Year of publication
1999
Pages
370 - 373
Database
ISI
SICI code
0018-1439(199911/12)33:6<370:DACODI>2.0.ZU;2-F
Abstract
Changes in the molecular-weight distribution of dextran macromolecules upon gamma-irradiation of 2-50 wt % aqueous solutions of this polysaccharide in the dose range 0-0.08 MGy were examined using viscometry and gel-permeatio n chromatography data. The crosslinking rather than degradation of the macr omolecules was found to be enhanced by gamma-radiolysis with increasing the polymer concentration in the solution. It was also found that this effect weakens with decreasing molecular weight of the initial dextran.