Low-shear-rate capillary viscometer for polymer solution intrinsic viscosity determination at varying temperatures

2003 ◽  
Vol 74 (1) ◽  
pp. 176-181 ◽  
Author(s):  
T. S. Rushing ◽  
R. D. Hester
Keyword(s):  
Shear Rate ◽  
Polymer Solution ◽  
Intrinsic Viscosity ◽  
Capillary Viscometer ◽  
Viscosity Determination ◽  
Low Shear

Influence of Chemical Nature on Flow Behavior of Polymers. I. Shear Rate and Temperature Dependence

1970 ◽  
Vol 43 (5) ◽  
pp. 1109-1115 ◽  
Author(s):  
E. A. Collins ◽  
T. Mass ◽  
W. H. Bauer
Keyword(s):  
Molecular Weight ◽  
Shear Rate ◽  
Chemical Nature ◽  
Flow Behavior ◽  
Capillary Viscometer ◽  
Low Molecular Weight ◽  
Flow Activation Energy ◽  
Flow Activation ◽  
Made In ◽  
Low Shear

Abstract The flow behavior of low molecular weight liquid polybutadiene polymers was studied as a function of shear rate, temperature, and molecular structure. Measurements were made in the temperature range 15 to 50° C and shear rate range 1 to 15,000 sec−1 with a cone and plate and a capillary viscometer. Limiting low shear viscosity, flow activation energy, and critical shear rate marking onset of shear rate thinning were found to be strongly dependent upon the presence of functional groups such as hydroxyl, carboxyl, and nitrile. The modifying groups showed a greater effect than the molecular weight upon the properties measured.

Determination of High Water Fluid Properties Using a Capillary Viscometer

1986 ◽  
Vol 108 (4) ◽  
pp. 565-569
Author(s):  
R. W. Mickelson ◽  
E. H. Sulick
Keyword(s):  
Shear Stress ◽  
Shear Rate ◽  
Pressure Drop ◽  
Polymer Solution ◽  
Elastic Energy ◽  
High Water ◽  
Capillary Viscometer ◽  
Pressure Drops ◽  
Fluid Properties

A simple capillary viscometer was used to demonstrate how one obtains the true shear stress-shear rate rheological properties of a polymer solution. The methodology, described in this paper, shows how the pressure drop caused by the friction of the liquid flowing through the tube is separated from the pressure drops associated with entrance and exit effects and the elastic energy of the polymer solution.

Experimental Research on the Quantitative Characterizations of Elasticity and Viscosity of Polyacrylamide Solution

2012 ◽  
Vol 430-432 ◽  
pp. 992-995
Author(s):  
Hui Fen Xia ◽  
Jiu Ran Zhang ◽  
Wen Guo Ma ◽  
Xia Ning Li ◽  
Qiu Yue Yang
Keyword(s):  
Shear Rate ◽  
Polymer Solution ◽  
Mass Concentration ◽  
Creep Recovery ◽  
Oil Reservoir ◽  
Minimum Mass ◽  
High Concentration ◽  
Elastic Part ◽  
Dynamic Experiments ◽  
Low Shear

Through creep-recovery and dynamic experiments, the viscoelasticity of polyacrylamide solutions (in short polymer) with different mass concentration are studied, the proportions of elastic part and viscous part in the polymer solution are calculated and the limit of mass concentration called high concentration polymer solution is given. It is indicated that the elastic part of the polymer solution increases firstly and tends to be constant with the increase in mass concentration under low external force condition. The minimum mass concentration of the polymer solution keeping constant elastic part is 1500mg/L. Under low stress and low shear rate conditions, the viscous part of the polymer solution is greater than that of elastic part; but under oil reservoir shear rate (6.283s-1) condition, the elastic part is greater than viscous part, and its elastic part increases with the increase in mass concentrations and the increment becomes smaller.

scholarly journals Epitaxial Crystallization of Poly(ε-caprolactone) on Reduced Graphene Oxide at a Low Shear Rate by In Situ SAXS/WAXD Methods

ACS Omega ◽  
2020 ◽  
Vol 5 (49) ◽  
pp. 31535-31542
Author(s):  
Weijun Miao ◽  
Feng Wu ◽  
Shiman Zhou ◽  
Guibin Yao ◽  
Yiguo Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Shear Rate ◽  
Reduced Graphene Oxide ◽  
Epitaxial Crystallization ◽  
Reduced Graphene ◽  
Low Shear

Formation of cylindrite structures in shear-induced crystallization of isotactic polypropylene at low shear rate

Polymer ◽  
2007 ◽  
Vol 48 (4) ◽  
pp. 1105-1115 ◽  
Author(s):  
Chenggui Zhang ◽  
Haiqing Hu ◽  
Xiaohong Wang ◽  
Yonghua Yao ◽  
Xia Dong ◽  
...  
Keyword(s):  
Shear Rate ◽  
Isotactic Polypropylene ◽  
Induced Crystallization ◽  
Low Shear

GRAFT COPOLYMERS OF STYRENE AND METHYL METHACRYLATE: PART II: VISCOSITY BEHAVIOR

1956 ◽  
Vol 34 (8) ◽  
pp. 1027-1036 ◽  
Author(s):  
M. H. Jones
Keyword(s):  
Shear Rate ◽  
Methyl Methacrylate ◽  
Graft Copolymers ◽  
Free Fall ◽  
Capillary Viscometer ◽  
Linear Polymers ◽  
Viscosity Behavior ◽  
Shear Gradient ◽  
Constant Shear Rate ◽  
Made In

A study of the viscosity behavior of the graft copolymers described in Part I has been made with dilute solutions in benzene at 25 °C. Although the slope constants of the Huggins equation increase with the frequency of branching when measurements are made in a capillary viscometer under 'free fall' conditions, this is shown to be attributable to the dependence of viscosity on shear gradient. At a constant shear rate, the Huggins k′ values approximate to those of linear polymers. It is suggested that the marked increase in viscosity observed with decreasing shear rate for the graft copolymers is due to molecular entanglement.

Dispersion and Rheological Properties of Alumina Freeze Casting Slurries Containing Nanoparticle/Whisker SiC

2007 ◽  
Vol 280-283 ◽  
pp. 1035-1038 ◽  
Author(s):  
Tae Young Yang ◽  
Young Min Park ◽  
Gun Dae Lee ◽  
Seog Young Yoon ◽  
Ron Stevens ◽  
...  
Keyword(s):  
Shear Rate ◽  
Shear Viscosity ◽  
Pure Alumina ◽  
Rheological Measurements ◽  
Continuous Shear ◽  
Suspension Viscosity ◽  
Low Shear Viscosity ◽  
Opposite Manner ◽  
High Structure ◽  
Low Shear

The sedimentation density significantly decreased after addition of dispersant; the effect was more pronounced with pure alumina, as compared with SiC-containing slurry. With further addition of surfactant, the sedimentation density increased somewhat, but decreased with binderadditions. The suspension viscosity generally behaved in an opposite manner to the sedimentation density, i.e., low sedimentation density gave high low-shear viscosity, indicative of high structure formation in the suspended particles. Shear rate rheological measurements showed continuous shear thinning behavior.

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