Extreme strain localization and sliding friction in physically associating polymer gels

Kendra A. Erk, Jeffrey D. Martin, Y. Thomas Hu, Kenneth R. Shull*

*Corresponding author for this work

Research output: Contribution to journalArticle

22 Scopus citations

Abstract

Model physically associating gels deformed in shear over a wide range of reduced rates displayed evidence of strain localization. The nonlinear stress responses and inhomogeneous velocity profiles observed during shear rheometry coupled with particle tracking velocimetry were associated with the occurrence of rate-dependent banding and fracture-like responses in the gel. Scaling law analysis from traditional sliding friction studies suggests that, at the molecular level, deformation is confined to a shear zone with thickness comparable to the mesh size of the gel, the smallest structurally relevant length scale in the gel.

Original languageEnglish (US)
Pages (from-to)4472-4478
Number of pages7
JournalLangmuir
Volume28
Issue number9
DOIs
StatePublished - Mar 6 2012

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Spectroscopy
  • Electrochemistry

Fingerprint Dive into the research topics of 'Extreme strain localization and sliding friction in physically associating polymer gels'. Together they form a unique fingerprint.

  • Cite this