Strain hardening in startup shear of long-chain branched polymer solutions.
Phys Rev Lett
; 111(6): 068302, 2013 Aug 09.
Article
em En
| MEDLINE
| ID: mdl-23971617
ABSTRACT
We show for the first time that entangled polymeric liquids containing long-chain branching can exhibit strain hardening upon startup shear. As the significant long-chain branching impedes chain disentanglement, Gaussian coils between entanglements can deform to reach the finite extensibility limit where the intrachain retraction force exceeds the value expected from the usual conformational entropy loss evaluated based on Gaussian chain statistics. The phenomenon is expected to lead to further theoretical understanding.
Buscar no Google
Base de dados:
MEDLINE
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article