Relaxation of anisotropic thermal diffusivity in a polymer melt following step shear strain

David C. Venerus, Jay D. Schieber, Hadjira Iddir, Job D. Guzman, Andrew W. Broerman

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

Forced Rayleigh light scattering is used to examine anisotropic thermal heat conduction due to deformation in a polymeric liquid. Thermal diffusivity is measured in both the flow and neutral directions in a polyisobutylene melt following the imposition of a step shear strain. The thermal diffusivity in the flow and neutral directions increases and decreases, respectively, immediately following the deformation before relaxing to an equilibrium value. Comparison of the difference between measured flow and neutral direction thermal diffusivities with the analogous flow-induced birefringence supports arguments for a proportionality between stress and thermal diffusivity.

Original languageEnglish (US)
Pages (from-to)366-369
Number of pages4
JournalPhysical Review Letters
Volume82
Issue number2
DOIs
StatePublished - 1999
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Fingerprint

Dive into the research topics of 'Relaxation of anisotropic thermal diffusivity in a polymer melt following step shear strain'. Together they form a unique fingerprint.

Cite this