Relationship between structural and stress relaxation in a block-copolymer melt

Amish J. Patel, Suresh Narayanan, Alec Sandy, Simon G.J. Mochrie, Bruce A. Garetz, Hiroshi Watanabe, Nitash P. Balsara

Research output: Contribution to journalArticle

Abstract

The relationship between structural relaxation on molecular length scales and macroscopic stress relaxation was explored in a disordered block-copolymer melt. Experiments show that the structural relaxation time, measured by x-ray photon correlation spectroscopy is larger than the terminal stress relaxation time, measured by rheology, by factors as large as 100. We demonstrate that the structural relaxation data are dominated by the diffusion of intact micelles while the stress relaxation data are dominated by contributions due to disordered concentration fluctuations.

Original languageEnglish (US)
Article number257801
JournalPhysical Review Letters
Volume96
Issue number25
DOIs
StatePublished - 2006

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Relationship between structural and stress relaxation in a block-copolymer melt'. Together they form a unique fingerprint.

Cite this