PARAMETER-FREE THEORY FOR STRESS-RELAXATION IN STAR POLYMER MELTS

Authors
MILNER ST MCLEISH TCB
Citation
St. Milner et Tcb. Mcleish, PARAMETER-FREE THEORY FOR STRESS-RELAXATION IN STAR POLYMER MELTS, Macromolecules, 30(7), 1997, pp. 2159-2166
Citations number
17
Categorie Soggetti
Polymer Sciences
Journal title
Macromolecules → ACNP
ISSN journal
00249297
Volume
30
Issue
7
Year of publication
1997
Pages
2159 - 2166
Database
ISI
SICI code
0024-9297(1997)30:7<2159:PTFSIS>2.0.ZU;2-1
Abstract
We present a theory of stress relaxation in star polymer melts with no adjustable parameters beyond those measurable in linear melts. We inc orporate the effect of higher Rouse modes on star arm retraction and t he Colby-Rubinstein scaling of entanglement length within ''dynamic di lution''. Our results for G ''(omega) compare well with experimental d ata, with excellent agreement in shape and within a factor of 2 in tim e and modulus scales.