GEL-SOL TRANSITION OF METHYLCELLULOSE

Citation
K. Nishinari et al., GEL-SOL TRANSITION OF METHYLCELLULOSE, Macromolecular chemistry and physics, 198(4), 1997, pp. 1217-1226
Citations number
14
Categorie Soggetti
Polymer Sciences
ISSN journal
10221352
Volume
198
Issue
4
Year of publication
1997
Pages
1217 - 1226
Database
ISI
SICI code
1022-1352(1997)198:4<1217:GTOM>2.0.ZU;2-B
Abstract
The gelation mechanism of aqueous solutions of methylcellulose (MC) wi th different molecular weights was studied by small deformation oscill ation rheological measurments and differential scanning calorimetry (D SC). The gelation is promoted by the increase in molecular weight of M C: the elastic modulus becomes larger, the gelation occurs at lower te mperatures and the DSC peaks accompanying the gel-sol transition becom e sharper. Cooling DSC curves split into two peaks, indicating that th e gel-to-sol transition occurred via two steps.