Enhancement of the first normal stress coefficient and dynamic moduli during shear thickening of a polymer solution

2003 ◽  
Vol 47 (4) ◽  
pp. 1041-1050 ◽  
Author(s):  
Maria Eugenia Muñoz ◽  
Anton Santamarı́a ◽  
Julio Guzmán ◽  
Evaristo Riande
Keyword(s):  
Polymer Solution ◽  
Normal Stress ◽  
Shear Thickening ◽  
Dynamic Moduli ◽  
Stress Coefficient

Normal Stress Coefficient in Solutions of Macromolecules

Nature ◽  
1948 ◽  
Vol 161 (4093) ◽  
pp. 567-568 ◽  
Author(s):  
R. S. RIVLIN
Keyword(s):  
Normal Stress ◽  
Stress Coefficient

Shear Thickening Behaviour of Composite Propellant Suspension under Oscillatory Shear

2016 ◽  
Vol 66 (3) ◽  
pp. 222 ◽  
Author(s):  
D. Singh ◽  
G. Dombe ◽  
C. Bhongale ◽  
P. P. Singh ◽  
Mehilal Maurya ◽  
...  
Keyword(s):  
Strain Amplitude ◽  
Loss Modulus ◽  
Shear Thickening ◽  
Rheological Behaviour ◽  
Complex Viscosity ◽  
Solid Particles ◽  
Dynamic Moduli ◽  
Composite Propellant ◽  
Plateau Region ◽  
Temperature Constant

Composite propellant suspensions consist of highly filled polymeric system wherein solid particles of different sizes and shapes are dispersed in a polymeric matrix. The rheological behaviour of a propellant suspension is characterised by viscoplasticity and shear rate and time dependant viscosity. The behaviour of composite propellant suspension has been studied under amplitude sweep test where tests were performed by continuously varying strain amplitude (strain in %, γ) by keeping the frequency and temperature constant and results are plotted in terms of log γ (strain amplitude) vs logGʹ and logGʺ (Storage modulus and loss modulus, respectively). It is clear from amplitude sweep test that dynamic moduli and complex viscosity show marked increase at critical strain amplitude after a plateau region, infering a shear thickening behaviour.

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