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Experimental evaluation of the pure configurational stress assumption in the flow dynamics of entangled polymer melts
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10.1122/1.3496378
/content/sor/journal/jor2/54/6/10.1122/1.3496378
http://aip.metastore.ingenta.com/content/sor/journal/jor2/54/6/10.1122/1.3496378

Figures

Image of FIG. 1.
FIG. 1.

Measured loss, (bullets; ●) and storage moduli, (open circles; ○) both as a function of the angular frequency, , from Auhl et al. (2008) at . The solid lines (—) are the least-squares fittings [Rasmussen et al. (2000)] to the BSW model in Eq. (3).

Image of FIG. 2.
FIG. 2.

Elongational stress as a function of the Hencky strain at . Startup and reversing elongation of the PI with corresponding to a De number of . The solid lines (—) are predictions from Eq. (1) corresponding to the measurements. The dashed lines (– – –) are predictions from Eq. (2) corresponding to the measurements.

Image of FIG. 3.
FIG. 3.

Elongational stress as a function of the Hencky strain at . Startup and reversing elongation of the PI with (bottom), (middle), and (top). The corresponding De numbers are (bottom), (middle), and (top). The solid lines (—) are predictions from Eq. (1), the dashed lines (– – –) are predictions from Eq. (2), and the dots (●) are the corresponding measurements.

Image of FIG. 4.
FIG. 4.

Recovery strain value, , plotted as against the maximal Hencky strain, . The solid lines (—) are predictions from Eq. (1), the dashed lines (– – –) are predictions from Eq. (2), and the circles (○) are the corresponding measurements, at (bottom), (middle), and (top).

Image of FIG. 5.
FIG. 5.

The correction factor [e.g., ] as a function of the imposed pre-stretch. The solid lines (—) are the numerical calculated correction factor. The dashed lines (– – –) are predictions from Eq. (A1). The initial aspect ratios are are 0.2, 0.3, 0.4, 0.6, 0.8, 1.0, 1.5 from the top to the bottom line, respectively.

Image of FIG. 6.
FIG. 6.

The correction factor [e.g., ] as a function of the imposed pre-stretch. The solid lines (—) are the numerical calculated correction factor. The dashed lines (– – –) are predictions from Eq. (6). The initial aspect ratios are are 0.2, 0.3, 0.4, 0.6, 0.8, 1.0, 1.5 from the top to the bottom line, respectively.

Tables

Generic image for table
TABLE I.

Linear viscoelastic parameters of the PI at .

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/content/sor/journal/jor2/54/6/10.1122/1.3496378
2010-10-11
2014-04-21
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Experimental evaluation of the pure configurational stress assumption in the flow dynamics of entangled polymer melts
http://aip.metastore.ingenta.com/content/sor/journal/jor2/54/6/10.1122/1.3496378
10.1122/1.3496378
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