The Tango Machine

Luker, Morgan James

doi:10.7208/chicago/9780226385686.001.0001

Cited by 20 publications

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“…Although polypropylene has much lower viscosity (k PP/PS 5 0.37), it is difficult to say it melts first. Generally, it is well know that polypropylene melts slowly because of the high melting temperature, high crystallinity, and low pellet compressibility [42].…”

Section: High-density Polyethylene/polystyrene Blend (Hdpe/psmentioning

confidence: 99%

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Experimental study of melting of polymer blends in a starve fed single screw extruder

Wilczyński

Lewandowski

2016

Polymer Engineering & Sci

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Experimental study is presented of the melting mechanism of polymer blends in a starve fed single screw extruder. Various polyblends were investigated such as PP/PS, HDPE/PS, and PP/PMMA. “Screw pulling‐out” technique was used to study the solid conveying, melting mechanism, and extent of starvation. It has been concluded that melting mechanism consists of two stages: conductive melting in the starve fed region and dispersed melting in the fully filled region. Substantial differences between melting of neat polymers and polymer blends were observed. In the case of polyblends, in the starved region a mixture of two solid polymers is melted by conduction, and in the fully filled region a dispersion of one or two solid polymers in a molten matrix is observed. Although contiguous solids melting mechanism was not seen for starve fed extrusion of polyblends, it was clearly observed for flood fed extrusion. Melting action seems to be faster for starve fed extruders than for flood fed machines, since the polyblend granules are not compacted into a dense solid bed. It was observed the pressure considerably decreases with level of starvation. Filling of the screw increases with an increase of the feed rate of polyblend, and decreases with an increase of the screw speed. Global modeling of the starve fed single screw extrusion of polyblends has been discussed. POLYM. ENG. SCI., 56:1349–1356, 2016. © 2016 Society of Plastics Engineers

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Section: High-density Polyethylene/polystyrene Blend (Hdpe/psmentioning

confidence: 99%

“…Later, the global model has been extended to nonconventional screw configurations [39,40]. It is interesting to note that Luker [41,42] used starving concepts to develop spiral fluted single screw extensional mixers with exceptional ability to compounding.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of melting of polymer blends in a starve fed single screw extruder

Wilczyński

Lewandowski

2016

Polymer Engineering & Sci

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“…Additional elongational deformation can contribute significantly to the effectiveness of the compounding process. Based on the knowledge of elongational deformation, several elongational flow mixing devices have been developed in the recent years [2,10,[25][26][27][28][29][30][31][32][33][34]. Some approaches have been achieved to apply elongational flow directly in the compounder [27][28][29]35].…”

Section: Introductionmentioning

confidence: 99%

Influence of elongational flow generating nozzles on material properties of polypropylene nanocomposites

Battisti

Perko

Arunachalam

et al. 2016

Polymer Engineering & Sci

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In this study, polymer nanocomposites (PNCs) based on polypropylene (PP), organoclay (used as nanoclay), and compatibilizer were prepared by a masterbatch (MB or two‐step) as well as by a one‐step process. These compounds were then injection molded into tensile test specimens and rectangular plates using conically and hyperbolically shaped nozzles. The use of these nozzles in the injection unit was to enhance intercalation and exfoliation in the PNCs by means of elongational flow. The pressure loss and temperature rise in the compound induced by this flow were characterized in temperature and pressure measurements. An additional calculation using a new analytic model showed good correlation with the measured values for the conically shaped nozzles whereas the pressure drops in the hyperbolically shaped nozzles were underpredicted. Mechanical as well as rheological characterizations were performed on the produced test specimens. The compounds from the MB process showed good intercalation and exfoliation and improved mechanical properties without any special elongational flow treatment. Similar properties were achieved with the one‐step process and elongational treatment using a short hyperbolically or conically shaped nozzle. These results indicated that it was possible to eliminate one complete compounding step and achieve the same mechanical properties in polypropylene nanocomposites when elongational elements were used. POLYM. ENG. SCI., 58:3–12, 2018. © 2016 Society of Plastics Engineers

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Tango Lessons: What Research on Tango Dancing Can Teach Us

Davis

2024

The Cambridge Companion to Tango

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The Tango Machine

Cited by 20 publications

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Experimental study of melting of polymer blends in a starve fed single screw extruder

Experimental study of melting of polymer blends in a starve fed single screw extruder

Influence of elongational flow generating nozzles on material properties of polypropylene nanocomposites

Tango Lessons: What Research on Tango Dancing Can Teach Us

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