Coating kinetics of fluoropolymer processing aids for sharkskin elimination: The role of droplet size

D. Bigio; M. G. Meillon; S. B. Kharchenko; D. Morgan; H. Zhou; S. R. Oriani; Chris Macosko; Kalman B. Migler

doi:10.1016/j.jnnfm.2005.04.008

Coating kinetics of fluoropolymer processing aids for sharkskin elimination: The role of droplet size

D. Bigio, M. G. Meillon, S. B. Kharchenko, D. Morgan, H. Zhou, S. R. Oriani, Chris Macosko, Kalman B. Migler

Chemical Engineering and Materials Science

Research output: Contribution to journal › Article › peer-review

24 Scopus citations

Abstract

The ability of fluoropolymer based polymer processing aids (PPA) to eliminate surface melt fracture (sharkskin) during extrusion of polyethylene is studied in relation to blend morphology (PPA droplet size) and processing conditions (shear rate). Under a constant throughput, the die entrance pressure, the PPA coating thickness and the degree of fracture are simultaneously monitored. The thickness of the fluoropolymer coating on the die surface is measured in situ through frustrated total internal reflection. A substantial enhancement in the coating rate and the magnitude of the steady state coating thickness as well as the faster elimination of sharkskin upon increase of PPA droplet size have been determined. These results are consistent with a recently developed model of the coating process.

Original language	English (US)
Pages (from-to)	22-31
Number of pages	10
Journal	Journal of Non-Newtonian Fluid Mechanics
Volume	131
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jnnfm.2005.04.008
State	Published - Nov 30 2005

Keywords

Blend
Coating
Domain size
Extrusion
Polyethylene
Sharkskin

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10.1016/j.jnnfm.2005.04.008

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title = "Coating kinetics of fluoropolymer processing aids for sharkskin elimination: The role of droplet size",

abstract = "The ability of fluoropolymer based polymer processing aids (PPA) to eliminate surface melt fracture (sharkskin) during extrusion of polyethylene is studied in relation to blend morphology (PPA droplet size) and processing conditions (shear rate). Under a constant throughput, the die entrance pressure, the PPA coating thickness and the degree of fracture are simultaneously monitored. The thickness of the fluoropolymer coating on the die surface is measured in situ through frustrated total internal reflection. A substantial enhancement in the coating rate and the magnitude of the steady state coating thickness as well as the faster elimination of sharkskin upon increase of PPA droplet size have been determined. These results are consistent with a recently developed model of the coating process.",

keywords = "Blend, Coating, Domain size, Extrusion, Polyethylene, Sharkskin",

author = "D. Bigio and Meillon, {M. G.} and Kharchenko, {S. B.} and D. Morgan and H. Zhou and Oriani, {S. R.} and Chris Macosko and Migler, {Kalman B.}",

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T1 - Coating kinetics of fluoropolymer processing aids for sharkskin elimination

T2 - The role of droplet size

AU - Bigio, D.

AU - Meillon, M. G.

AU - Kharchenko, S. B.

AU - Morgan, D.

AU - Zhou, H.

AU - Oriani, S. R.

AU - Macosko, Chris

AU - Migler, Kalman B.

PY - 2005/11/30

Y1 - 2005/11/30

N2 - The ability of fluoropolymer based polymer processing aids (PPA) to eliminate surface melt fracture (sharkskin) during extrusion of polyethylene is studied in relation to blend morphology (PPA droplet size) and processing conditions (shear rate). Under a constant throughput, the die entrance pressure, the PPA coating thickness and the degree of fracture are simultaneously monitored. The thickness of the fluoropolymer coating on the die surface is measured in situ through frustrated total internal reflection. A substantial enhancement in the coating rate and the magnitude of the steady state coating thickness as well as the faster elimination of sharkskin upon increase of PPA droplet size have been determined. These results are consistent with a recently developed model of the coating process.

AB - The ability of fluoropolymer based polymer processing aids (PPA) to eliminate surface melt fracture (sharkskin) during extrusion of polyethylene is studied in relation to blend morphology (PPA droplet size) and processing conditions (shear rate). Under a constant throughput, the die entrance pressure, the PPA coating thickness and the degree of fracture are simultaneously monitored. The thickness of the fluoropolymer coating on the die surface is measured in situ through frustrated total internal reflection. A substantial enhancement in the coating rate and the magnitude of the steady state coating thickness as well as the faster elimination of sharkskin upon increase of PPA droplet size have been determined. These results are consistent with a recently developed model of the coating process.

KW - Blend

KW - Coating

KW - Domain size

KW - Extrusion

KW - Polyethylene

KW - Sharkskin

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AN - SCOPUS:28244461572

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JO - Journal of Non-Newtonian Fluid Mechanics

JF - Journal of Non-Newtonian Fluid Mechanics

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ER -

Coating kinetics of fluoropolymer processing aids for sharkskin elimination: The role of droplet size

Abstract

Keywords

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