The rheological characterization of fluorinated thermoplastics using squeezing flow viscometry

Yong Deng; George C. Martin; Gerard P. Kohut; Jeffrey T. Gotro

doi:10.1002/pen.760340307

The rheological characterization of fluorinated thermoplastics using squeezing flow viscometry

Yong Deng, George C. Martin, Gerard P. Kohut, Jeffrey T. Gotro

Department of Biomedical & Chemical Engineering

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

2 Scopus citations

Abstract

A squeezing flow viscometer was developed to characterize the rheological properties of luorinated thermoplastics. The viscosities of CTFE (polychlorotrifluorethylene) and FEP (a copolymer of tetrafluoroethylene and hexafluoropropylene) were determined using the viscometer by assuming that the shear‐rate dependent viscosity can be described by a power‐law, a truncated power‐law, or an Ellis model. The results were in agreement with the viscosities measured with steady shear cone‐and‐plate viscometry and oscillatory cone‐and‐plate rheometry. Although the squeezing flow behavior of the polymers can be well explained by the purely viscous models, the power‐law model is valid only for a limited range of shear‐rates whereas the other two models are useful over a relatively wide range.

Original language	English (US)
Pages (from-to)	213-220
Number of pages	8
Journal	Polymer Engineering & Science
Volume	34
Issue number	3
DOIs	https://doi.org/10.1002/pen.760340307
State	Published - Feb 1994

ASJC Scopus subject areas

General Chemistry
Polymers and Plastics
Materials Chemistry

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title = "The rheological characterization of fluorinated thermoplastics using squeezing flow viscometry",

abstract = "A squeezing flow viscometer was developed to characterize the rheological properties of luorinated thermoplastics. The viscosities of CTFE (polychlorotrifluorethylene) and FEP (a copolymer of tetrafluoroethylene and hexafluoropropylene) were determined using the viscometer by assuming that the shear‐rate dependent viscosity can be described by a power‐law, a truncated power‐law, or an Ellis model. The results were in agreement with the viscosities measured with steady shear cone‐and‐plate viscometry and oscillatory cone‐and‐plate rheometry. Although the squeezing flow behavior of the polymers can be well explained by the purely viscous models, the power‐law model is valid only for a limited range of shear‐rates whereas the other two models are useful over a relatively wide range.",

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T1 - The rheological characterization of fluorinated thermoplastics using squeezing flow viscometry

AU - Deng, Yong

AU - Martin, George C.

AU - Kohut, Gerard P.

AU - Gotro, Jeffrey T.

PY - 1994/2

Y1 - 1994/2

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AB - A squeezing flow viscometer was developed to characterize the rheological properties of luorinated thermoplastics. The viscosities of CTFE (polychlorotrifluorethylene) and FEP (a copolymer of tetrafluoroethylene and hexafluoropropylene) were determined using the viscometer by assuming that the shear‐rate dependent viscosity can be described by a power‐law, a truncated power‐law, or an Ellis model. The results were in agreement with the viscosities measured with steady shear cone‐and‐plate viscometry and oscillatory cone‐and‐plate rheometry. Although the squeezing flow behavior of the polymers can be well explained by the purely viscous models, the power‐law model is valid only for a limited range of shear‐rates whereas the other two models are useful over a relatively wide range.

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The rheological characterization of fluorinated thermoplastics using squeezing flow viscometry

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