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 |
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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 |
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Country | United States |
City | Charlotte, NC |
Period | 05/7/06 → 05/11/06 |
Keywords
- Cox-Merz rule
- Edge fracture
- Instability
- Mass loss
- Steady shearing flows