Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2013-08-08

Journal: PHYSICAL REVIEW LETTERS

Included Journals: Scopus、EI、SCIE

Volume: 111

Issue: 6

ISSN: 0031-9007

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.