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Thermodynamic scaling of polymer dynamics versus T – Tg scaling
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10.1063/1.3624903
/content/aip/journal/jcp/135/7/10.1063/1.3624903
http://aip.metastore.ingenta.com/content/aip/journal/jcp/135/7/10.1063/1.3624903

Figures

Image of FIG. 1.
FIG. 1.

Temperature- and pressure-dependent normalized relaxation times [log(τ/τTg)] as a function of 1/TVγ for six polymers. The data are obtained at the pressures indicated on the right hand side of the figure. The solid lines are calculated from Eq. (3); the dashed lines are calculated from Eq. (4). (View in color for best clarity.)

Image of FIG. 2.
FIG. 2.

Temperature- and pressure-dependent normalized relaxation times [log(τ/τTg)] as a function of T – Tg and TgVg γ/TVγ for the linear and star polystyrenes. The lower data relate to the lower and right axes, and the upper data relate to the upper and left axes. The solid lines for T – Tg and TgVg γ/TVγ scaling laws are calculated from Eqs. (1) and (5), respectively.

Image of FIG. 3.
FIG. 3.

Temperature- and pressure-dependent normalized relaxation times [log(τ/τTg)] as a function of T – Tg and TgVg γ/TVγ for two polycyanurate networks having different crosslink densities. The lower data relate to the lower and right axes, and the upper data relate to the upper and left axes. The solid lines for T – Tg and TgVg γ/TVγ scaling laws are calculated from Eqs. (1) and (5), respectively.

Image of FIG. 4.
FIG. 4.

Temperature- and pressure-dependent normalized relaxation times [log(τ/τTg)] as a function of T – Tg and TgVg γ/TVγ for PVAc. The lower data relate to the lower and right axes, and the upper data relate to the upper and left axes. The solid lines for T – Tg and TgVg γ/TVγ scaling laws are calculated from Eqs. (1) and (5), respectively.

Image of FIG. 5.
FIG. 5.

Temperature- and pressure-dependent normalized relaxation times [log(τ/τTg)] as a function of T – Tg and TgVg γ/TVγ for PVC. The lower data relate to the lower and right axes, and the upper data relate to the upper and left axes. The solid lines for T – Tg and TgVg γ/TVγ scaling laws are calculated from Eqs. (1) and (5), respectively.

Image of FIG. 6.
FIG. 6.

Temperature- and pressure-dependent normalized relaxation times [log(τ/τTg)] as a function of (T – Tg)(1/Tg(P) + γαl) for polystyrenes (a), polycyanurates (b), PVAc (c), and PVC (d). The solid lines are calculated from Eq. (10).

Tables

Generic image for table
Table I.

Thermodynamic scaling exponent (γ) for TVγ scaling.

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Table II.

Comparison of mean squared deviation, χ2 × 102, for different scaling methods.

Generic image for table
Table III.

Parameters for the pressure-dependent coefficient of thermal expansion in the liquid state αl in Eq. (9).

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/content/aip/journal/jcp/135/7/10.1063/1.3624903
2011-08-18
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Thermodynamic scaling of polymer dynamics versus T – Tg scaling
http://aip.metastore.ingenta.com/content/aip/journal/jcp/135/7/10.1063/1.3624903
10.1063/1.3624903
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