scholarly journals Extensional rheometry of model liquids: Simulations of filament stretching

2021 ◽  
Vol 33 (12) ◽  
pp. 123108
Author(s):  
Ole Hassager ◽  
Yanwei Wang ◽  
Qian Huang
Keyword(s):  
Filament Stretching ◽  
Extensional Rheometry

Addendum: Rotary Clamp in Uniaxial and Biaxial Extensional Rheometry of Polymer Melts [J. Rheol., 25 1 (1981)]

1981 ◽  
Vol 25 (6) ◽  
pp. 673-674 ◽  
Author(s):  
J. Meissner ◽  
T. Raible ◽  
S. E. Stephenson
Keyword(s):  
Polymer Melts ◽  
Extensional Rheometry

scholarly journals Enhanced Foamability with Shrinking Microfibers in Linear Polymer

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 211 ◽  
Author(s):  
Eric Kim ◽  
Heon Park ◽  
Carlos Lopez-Barron ◽  
Patrick Lee
Keyword(s):  
Strain Hardening ◽  
Polymer Processing ◽  
Expansion Ratio ◽  
Low Frequencies ◽  
Extensional Rheometry ◽  
Enhanced Strain ◽  
Linear Viscoelastic ◽  
Cost Efficient ◽  
Strain Hardening Behavior

Strain hardening has important roles in understanding material structures and polymer processing methods, such as foaming, film forming, and fiber extruding. A common method to improve strain hardening behavior is to chemically branch polymer structures, which is costly, thus preventing users from controlling the degree of behavior. A smart microfiber blending technology, however, would allow cost-efficient tuning of the degree of strain hardening. In this study, we investigated the effects of compounding polymers with microfibers for both shear and extensional rheological behaviors and characteristics and thus for the final foam morphologies formed by batch physical foaming with carbon dioxide. Extensional rheometry showed that compounding of in situ shrinking microfibers significantly enhanced strain hardening compared to compounding of nonshrinking microfibers. Shear rheometry with linear viscoelastic data showed a greater increase in both the loss and storage modulus in composites with shrinking microfibers than in those with nonshrinking microfibers at low frequencies. The batch physical foaming results demonstrated a greater increase in the cell population density and expansion ratio with in situ shrinking microfibers than with nonshrinking microfibers. The enhancement due to the shrinkage of compounded microfibers decreasing with temperature implies that the strain hardening can be tailored by changing processing conditions.

scholarly journals Using filament stretching rheometry to predict strand formation and "processability" in adhesives and other non-Newtonian fluids

2000 ◽  
Vol 39 (4) ◽  
pp. 321-337 ◽  
Author(s):  
Anubhar Tripathi ◽  
P. Whittingstall ◽  
Gareth H. McKinley
Keyword(s):  
Newtonian Fluids ◽  
Filament Stretching

Filament stretching rheometer: inertia compensation revisited

2003 ◽  
Vol 42 (3) ◽  
pp. 269-272 ◽  
Author(s):  
Peter Szabo ◽  
Gareth H. McKinley
Keyword(s):  
Filament Stretching

Classical wave equation in fluid filament stretching

1988 ◽  
Vol 27 (5) ◽  
pp. 466-476 ◽  
Author(s):  
S. Kase ◽  
T. Nishimura
Keyword(s):  
Wave Equation ◽  
Filament Stretching ◽  
Classical Wave ◽  
Fluid Filament ◽  
Classical Wave Equation

The role of end-effects on measurements of extensional viscosity in filament stretching rheometers

1996 ◽  
Vol 64 (2-3) ◽  
pp. 229-267 ◽  
Author(s):  
Stephen H. Spiegelberg ◽  
David C. Ables ◽  
Gareth H. McKinley
Keyword(s):  
Extensional Viscosity ◽  
End Effects ◽  
Filament Stretching
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