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

doi:10.1103/PhysRevLett.82.366

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 journal › Article › peer-review

38 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 language	English (US)
Pages (from-to)	366-369
Number of pages	4
Journal	Physical Review Letters
Volume	82
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevLett.82.366
State	Published - 1999
Externally published	Yes

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.82.366

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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.",

author = "Venerus, {David C.} and Schieber, {Jay D.} and Hadjira Iddir and Guzman, {Job D.} and Broerman, {Andrew W.}",

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AU - Venerus, David C.

AU - Schieber, Jay D.

AU - Iddir, Hadjira

AU - Guzman, Job D.

AU - Broerman, Andrew W.

PY - 1999

Y1 - 1999

N2 - 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.

AB - 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.

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JF - Physical Review Letters

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

Abstract

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