Breakdown of the cox-merz rule and instability of polymer solutions in viscometric flows

Changping Sui; Gregory B. McKenna

Breakdown of the cox-merz rule and instability of polymer solutions in viscometric flows

Changping Sui, Gregory B. McKenna

Chemical Engineering

Research output: Contribution to conference › Paper › peer-review

3 Scopus citations

Abstract

There has been considerable interest in recent years concerning the instability of polymer melts and solutions in viscometric flows. Here we examine the flow instability in a polybutadiene solution and in NIST SRM 2490. The instability manifests itself as a deviation from the Cox-Merz rule that relates steady shear viscosity vs. shear rate with dynamic viscosity vs. frequency. We find that in all instances of deviation from the Cox-Merz rule investigated the fluid undergoes edge fracture and the deviations can be related to the edge fracture rather than to changes in constitutive behavior.

Original language	English
Pages	2351-2355
Number of pages	5
State	Published - 2006
Event	Society of Plastics Engineers Annual Technical Conference 2006, ANTEC 2006 - Charlotte, NC, United States Duration: May 7 2006 → May 11 2006

Conference

Conference	Society of Plastics Engineers Annual Technical Conference 2006, ANTEC 2006
Country/Territory	United States
City	Charlotte, NC
Period	05/7/06 → 05/11/06

Keywords

Cox-Merz rule
Edge fracture
Instability
Mass loss
Steady shearing flows

Cite this

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title = "Breakdown of the cox-merz rule and instability of polymer solutions in viscometric flows",

abstract = "There has been considerable interest in recent years concerning the instability of polymer melts and solutions in viscometric flows. Here we examine the flow instability in a polybutadiene solution and in NIST SRM 2490. The instability manifests itself as a deviation from the Cox-Merz rule that relates steady shear viscosity vs. shear rate with dynamic viscosity vs. frequency. We find that in all instances of deviation from the Cox-Merz rule investigated the fluid undergoes edge fracture and the deviations can be related to the edge fracture rather than to changes in constitutive behavior.",

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author = "Changping Sui and McKenna, {Gregory B.}",

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T1 - Breakdown of the cox-merz rule and instability of polymer solutions in viscometric flows

AU - Sui, Changping

AU - McKenna, Gregory B.

PY - 2006

Y1 - 2006

N2 - There has been considerable interest in recent years concerning the instability of polymer melts and solutions in viscometric flows. Here we examine the flow instability in a polybutadiene solution and in NIST SRM 2490. The instability manifests itself as a deviation from the Cox-Merz rule that relates steady shear viscosity vs. shear rate with dynamic viscosity vs. frequency. We find that in all instances of deviation from the Cox-Merz rule investigated the fluid undergoes edge fracture and the deviations can be related to the edge fracture rather than to changes in constitutive behavior.

AB - There has been considerable interest in recent years concerning the instability of polymer melts and solutions in viscometric flows. Here we examine the flow instability in a polybutadiene solution and in NIST SRM 2490. The instability manifests itself as a deviation from the Cox-Merz rule that relates steady shear viscosity vs. shear rate with dynamic viscosity vs. frequency. We find that in all instances of deviation from the Cox-Merz rule investigated the fluid undergoes edge fracture and the deviations can be related to the edge fracture rather than to changes in constitutive behavior.

KW - Cox-Merz rule

KW - Edge fracture

KW - Instability

KW - Mass loss

KW - Steady shearing flows

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M3 - Paper

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SP - 2351

EP - 2355

Y2 - 7 May 2006 through 11 May 2006

ER -

Breakdown of the cox-merz rule and instability of polymer solutions in viscometric flows

Abstract

Conference

Keywords

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