INFLUENCE OF THE SHEAR RATE, OF THE MOLECULAR ARCHITECTURE AND OF THEMOLECULAR-MASS ON THE CRITICAL OVERLAPPING CONCENTRATION-C

Authors
PAPANAGOPOULOS D PIERRI E DONDOS A
Citation
D. Papanagopoulos et al., INFLUENCE OF THE SHEAR RATE, OF THE MOLECULAR ARCHITECTURE AND OF THEMOLECULAR-MASS ON THE CRITICAL OVERLAPPING CONCENTRATION-C, Polymer, 39(11), 1998, pp. 2195-2199
Citations number
19
Categorie Soggetti
Polymer Sciences
Journal title
Polymer → ACNP
ISSN journal
00323861
Volume
39
Issue
11
Year of publication
1998
Pages
2195 - 2199
Database
ISI
SICI code
0032-3861(1998)39:11<2195:IOTSRO>2.0.ZU;2-1
Abstract
The critical overlapping concentration c has been studied in the dyna mic state (by viscometry) and in the static state (by light scattering ). An increase of the shear rate of the solution provokes an increase of c in the case of linear polymers. In the case of a highly branched polymer the shear rate has no influence on its critical concentration . The scaling law between c and the molecular mass for a given polyme r-solvent system presents two different exponents, depending on the mo lecular mass region of the polymer. (C) 1998 Elsevier Science Ltd. All rights reserved.