Determination of the Pressure Dependence of the Shear Viscosity of Polymer Melts Using a Capillary Rheometer with an Attached Counter Pressure Chamber

2015 ◽  
Vol 54 (9) ◽  
pp. 1029-1041 ◽  
Author(s):  
Chao Li ◽  
Feng Jiang ◽  
Liheng Wu ◽  
Xiaoyan Yuan ◽  
Xin Li
Keyword(s):  
Shear Viscosity ◽  
Pressure Dependence ◽  
Polymer Melts ◽  
Pressure Chamber ◽  
Capillary Rheometer ◽  
Counter Pressure

Determination of the pressure dependence of polymer melt viscosity using a combination of oscillatory and capillary rheometer

2019 ◽  
Vol 60 (3) ◽  
pp. 517-523 ◽  
Author(s):  
Sumanta Raha ◽  
Harindranath Sharma ◽  
M. Senthilmurugan ◽  
Sumanda Bandyopadhyay ◽  
Prasanta Mukhopadhyay
Keyword(s):  
Pressure Dependence ◽  
Polymer Melt ◽  
Capillary Rheometer ◽  
Melt Viscosity

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.

Rheological Behavior and Extrudate Swell of Polypropylene/Silicon Carbide Composites

2013 ◽  
Vol 747 ◽  
pp. 595-598 ◽  
Author(s):  
Apaipan Rattanapan ◽  
Nuttaphong Sornsuwit ◽  
Rapeephun Dangtungee
Keyword(s):  
Silicon Carbide ◽  
Shear Stress ◽  
Shear Viscosity ◽  
Rheological Behavior ◽  
Sem Analysis ◽  
Elongation Rate ◽  
Capillary Rheometer ◽  
Extrudate Swell ◽  
Elongation Viscosity ◽  
Sic Composites

The rheological behavior and extrudate swell of polypropylene (PP)/silicon carbide (SiC) composites were investigated. Polypropylene-grafted-maleic anhydride (PP-g-MA) was introduced into blending system as a compatibilizer. The effect of silicon carbide loading and surface modification on the rheological behavior of PP/SiC composites were studied using a capillary rheometer and SEM analysis. The results showed that the composites exhibit pseudoplastic behavior as the shear stress and extrudate swell increased with increasing shear rate, while shear viscosity decreased. Moreover, an increasing elongation rate leads to reduce elongation viscosity. The addition of PP-g-MA in PP/SiC composites has significantly decreased the apparent shear stress, apparent shear viscosity and percentage of extrudate swell.

Determination of the pressure dependence of transference numbers

1970 ◽  
Vol 74 (13) ◽  
pp. 2724-2726 ◽  
Author(s):  
Robert L. Kay ◽  
Krishnahadi S. Pribadi ◽  
Barry Watson
Keyword(s):  
Pressure Dependence ◽  
Transference Numbers
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