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Continuous lubricated squeezing flow: A novel technique for equibiaxial elongational viscosity measurements on polymer melts
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10.1122/1.3474599
/content/sor/journal/jor2/54/5/10.1122/1.3474599
http://aip.metastore.ingenta.com/content/sor/journal/jor2/54/5/10.1122/1.3474599
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic diagram of CLSF technique [Venerus and Kompani (1999)]

Image of FIG. 2.
FIG. 2.

Detailed view of CLSF used to analyze hydrodynamic behavior of lubricant film and interaction with melt

Image of FIG. 3.
FIG. 3.

Image of mounted CLSF tools without sample. The lower tool is connected by a vertical shaft to a linear motor, and the upper tool is connected by a vertical shaft to the transducer. The horizontal tubes connected to the upper and lower tools are connected to a syringe pump (not shown). Both the upper and lower tools have electrical heating systems housed in (white) ceramic enclosures.

Image of FIG. 4.
FIG. 4.

Demonstration of technique used to find zero gap between porous plates . For fixed flow rate and lubricant , the force is measured as a function of nominal (half-) gap (◻). The data are shifted horizontally by (◼) so that they fall on the solid line, which is the prediction from Eq. (10). A second set of versus data (●) are plotted to confirm corrected gap.

Image of FIG. 5.
FIG. 5.

Comparison of equibiaxial elongational viscosity measured using LSF and CLSF techniques with data from the MAD device (◆). LDPE1810H at for a strain rate . Experimental parameters for experiments: , : , ; LSF (○): , ; CLSF (△): , ; CLSF (◻): , . Solid line is linear viscoelastic prediction from Eq. (11).

Image of FIG. 6.
FIG. 6.

Comparison of equibiaxial elongational viscosities for PS158K at measured using MAD (filled symbols) device and CLSF (open symbols) technique with , , , , , and . Different symbols correspond to the following strain rates: (○,●); (◻,◼); (◇,◆); (▽,▼). Solid line is linear viscoelastic prediction from Eq. (11).

Image of FIG. 7.
FIG. 7.

Comparison of equibiaxial elongational viscosities for LDPE1810H at measured using MAD (filled symbols) device and CLSF (open symbols) technique with , , , , , and . Different symbols correspond to the following strain rates: (○,●); (◻,◼); (◇,◆); (▽,▼). Solid line is linear viscoelastic prediction from Eq. (11).

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/content/sor/journal/jor2/54/5/10.1122/1.3474599
2010-08-30
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Continuous lubricated squeezing flow: A novel technique for equibiaxial elongational viscosity measurements on polymer melts
http://aip.metastore.ingenta.com/content/sor/journal/jor2/54/5/10.1122/1.3474599
10.1122/1.3474599
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