Capillary study on geometrical dependence of shear viscosity of polymer melts

2013 ◽  
Vol 131 (6) ◽  
pp. n/a-n/a ◽  
Author(s):  
Xiang Lin ◽  
Adrian Kelly ◽  
Mike Woodhead ◽  
Dongyun Ren ◽  
Kuisheng Wang ◽  
...  
Keyword(s):  
Shear Viscosity ◽  
Polymer Melts

The effect of pressure on the shear viscosity of polymer melts

1973 ◽  
Vol 12 (2) ◽  
pp. 263-268 ◽  
Author(s):  
M. R. Kamal ◽  
H. Nyun
Keyword(s):  
Shear Viscosity ◽  
Polymer Melts ◽  
Effect Of Pressure

Experimental Study on the Rheological Characteristics of Polymer Melts under Micro Scale Effect

2009 ◽  
Vol 628-629 ◽  
pp. 429-434 ◽  
Author(s):  
D.Y. Zhao ◽  
Y.F. Jin ◽  
Min Jie Wang ◽  
X.W. Sun ◽  
M.C. Song
Keyword(s):  
Experimental Study ◽  
Shear Rate ◽  
Scale Effect ◽  
Shear Viscosity ◽  
Arrhenius Equation ◽  
Polymer Melts ◽  
Rheological Characteristics ◽  
Capillary Rheometer ◽  
Micro Scale ◽  
Effects Of Temperature

The rheological characteristics of four polymer melts (PS, PMMA, PP and HDPE) are investigated by a capillary rheometer with the die diameters from 1.5mm to 0.5mm.The effects of temperature on shear viscosity and the effects of both temperature and shear rate on non-Newton exponent of melts are discussed when the die diameter is 0.5mm. The results show that the shear viscosity of four polymers decreases with the rise of shear rate. The shear viscosity of PS and PMMA increases with the decrease of die diameter, the shear viscosity of PP and HDPE decreases with die diameter and minute differences of shear viscosity with different die diameters are observed with the growth of shear rate. When the die diameter is 0.5mm, Arrhenius equation is found to be suitable to describe the relations between shear viscosity and temperature for four polymer melts. The non-Newton exponents of four polymer melts increase with the temperature and decrease with the rise of shear rate.

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