Pressure and Temperature Dependence of the Dilute Solution Segmental Dynamics of Anthracene-Labeled Polyisoprene

Pressure and Temperature Dependence of the Dilute Solution Segmental Dynamics of Anthracene-Labeled Polyisoprene

The local segmental dynamics of anthracene-labeled cis-1,4-polyisoprene in dilute solution have been studied as a function of temperature (298−323 K) and pressure (0.1−150 MPa) in several solvents (dioctyl phthalate, n-dodecane, squalane, and toluene). This range of temperature and pressure afforded...

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Veröffentlicht in:Macromolecules 2002-04, Vol.35 (8), p.3281-3287
Hauptverfasser: Punchard, B. J, Adolf, D. B
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Sprache:eng
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Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Solution and gel properties
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Adolf, D. B
description The local segmental dynamics of anthracene-labeled cis-1,4-polyisoprene in dilute solution have been studied as a function of temperature (298−323 K) and pressure (0.1−150 MPa) in several solvents (dioctyl phthalate, n-dodecane, squalane, and toluene). This range of temperature and pressure afforded a viscosity range of 0.55−494 mPa·s. Previous studies of cis-1,4-polyisoprene as a function of temperature at ambient pressure have revealed that these motions scale as a fractional power of the solvent viscosity, η, thereby violating Kramers' theory which predicts τ c ∼ η. Findings reveal quantitatively similar behavior is observed when the solvent viscosity is varied by pressure at fixed temperatures.
doi_str_mv 10.1021/ma011783r
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subjects Applied sciences
Exact sciences and technology
Organic polymers
Physicochemistry of polymers
Properties and characterization
Solution and gel properties
title Pressure and Temperature Dependence of the Dilute Solution Segmental Dynamics of Anthracene-Labeled Polyisoprene
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