Elongational rheology by different methods and orientation number

2007 ◽  
Vol 105 (6) ◽  
pp. 3551-3561 ◽  
Author(s):  
John R. Collier ◽  
Simioan Petrovan ◽  
Nick Hudson ◽  
Xiaoling Wei
Keyword(s):  
Elongational Rheology

Rheology of 1-butyl-3-methylimidazolium chloride cellulose solutions. III. Elongational rheology

2008 ◽  
Vol 110 (5) ◽  
pp. 3203-3208 ◽  
Author(s):  
Rhea J. Sammons ◽  
John R. Collier ◽  
Timothy G. Rials ◽  
Simioan Petrovan
Keyword(s):  
Elongational Rheology

Numerical Simulation of Elongational Flow in Polymer Vane Extruder

2011 ◽  
Vol 421 ◽  
pp. 415-418 ◽  
Author(s):  
Jin Song Wen ◽  
Yao Huan Liang ◽  
Zhi Min Chen
Keyword(s):  
Numerical Simulation ◽  
Elongational Flow ◽  
Theoretical Derivation ◽  
Elongational Rheology ◽  
New Type ◽  
Local Shear ◽  
Elongation Flow ◽  
Finite Element Numerical Simulation ◽  
Intuitive View ◽  
Time And Energy

Polymer vane extruder is a new type of extrusion machine, whose plasticating and conveying method is based on elongational rheology. The vane extruder has many advantages over conventional plasticating method, such as shortening thermo-mechanical experience of plasticating and conveying, reducing the energy consumption of plasticating and conveying, and improving adaptability to diverse materials. Currently, research for characteristics of vane extruder is mostly focused on theoretical derivation and experiments. However, these methods lead to high consumption of time and energy, and cannot provide an intuitive view of the flow. In this paper, 3D finite element numerical simulation was performed to investigate the flow in one of the vane units with POLYFLOW. The elongation flow was investigated by analyzing velocity field, pressure field, local-shear-rate distribution and mixing index distribution. The results show that numerical simulation is an efficient method to optimize process parameters and the structure of vane extruder.

A novel hyperbolic slit contraction with constant strain rate for elongational rheology of polymer melts

2019 ◽  
Vol 73 ◽  
pp. 104-114 ◽  
Author(s):  
Hans-Jürgen Luger ◽  
Bernhard Löw-Baselli ◽  
Andreas Neunhäuserer ◽  
Walter Friesenbichler ◽  
Jürgen Miethlinger
Keyword(s):  
Strain Rate ◽  
Polymer Melts ◽  
Constant Strain Rate ◽  
Elongational Rheology

An investigation on modelling and measurements of transient elongational rheology of polymer melts by SER testing platform

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Mahmoud Rajabian ◽  
Ghassem Naderi ◽  
Hamid Piroozfar ◽  
Mohammad H. Beheshty ◽  
Mohammad Samadfam
Keyword(s):  
Steady State ◽  
Simple Shear ◽  
Shear Flows ◽  
Polymer Melts ◽  
Elongational Viscosity ◽  
Extensional Viscosity ◽  
Molten State ◽  
Diffusion Term ◽  
Hencky Strain ◽  
Elongational Rheology

AbstractTransient elongational rheology of PP is investigated experimentally. A specifically designed fixture consisting of two drums mounted on a TA Instruments ARES rotational rheometer was used to measure the transient uniaxial extensional viscosity of two commercial grades polypropylene in the molten state. The Hencky strain was varied from 0.003 to 2 s-1 and the temperature was fixed at 180 oC. The measurements show that the steady state elongational viscosity was reached at the measured Hencky strains for polypropylene. Eslami and Grmela have recently introduced a reptation diffusion term arising from the intermolecular chain forces into the rigid FENE-P dumbbells model. The same approach has been used in this study to interpret the transient rheological data in both shear-free and simple shear flows.

scholarly journals Nonlinear Elongational Rheology of Unentangled Polystyrene and Poly(p-tert-butylstyrene) Melts

2018 ◽  
Vol 51 (23) ◽  
pp. 9710-9729 ◽  
Author(s):  
Yumi Matsumiya ◽  
Hiroshi Watanabe ◽  
Yuichi Masubuchi ◽  
Qian Huang ◽  
Ole Hassager
Keyword(s):  
Elongational Rheology
Sign in / Sign up

Export Citation Format

Share Document