Polymer Solution Rheology
Polymer Solution Rheology - Related Videos
07:14
In situ Photo-rheology Monitors Viscoelastic Changes in Photo-responsive Polymer Networks
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2025
We describe a procedure used to collect in situ photo-rheology measurements of polymeric materials undergoing photo-responsive liquid-to-solid transitions.
10:38
Measurement of the Rheology of Crude Oil in Equilibrium with CO2 at Reservoir Conditions
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Cited by 2 •
2017
A method for measuring the rheology of crude oil in equilibrium with carbon dioxide at reservoir conditions is presented.
08:00
DNA Nanotubes as a Versatile Tool to Study Semiflexible Polymers
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Cited by 5 •
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Semiflexible polymers display unique mechanical properties that are extensively applied by living systems. However, systematic studies on biopolymers are limited since properties such as polymer rigidity are inaccessible. This manuscript describes how this limitation is circumvented by programmable DNA nanotubes, enabling experimental studies on the impact of filament rigidity.
02:34
Polymers
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2020
The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...
08:04
Viscosity of Propylene Glycol Solutions
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2023
Source: Michael G. Benton and Kerry M. Dooley, Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA Viscosity is a measure of a fluid's resistance to flow, and it is a useful parameter in the design of efficient product processing and quality control in a wide range of industries. A variety of viscometers are used to obtain the most accurate readings of experimental materials. The standard method of measuring viscosity is through a glass tube viscometer, which...
FAQs
Shear can stretch and orient dissolved polymer chains rather than deforming the liquid instantaneously as a simple fluid would. When the applied deformation changes or stops, the chains relax toward less distorted configurations. This competition between deformation and relaxation produces both viscous flow and elastic response, while also making the measured viscosity dependent on shear rate.
Concentration, molecular weight, solvent quality, and temperature are the principal variables identified in Polymer Solution Rheology. They alter how chains move, interact, stretch, and become entangled within the liquid. Comparing measurements while varying these conditions helps connect changes in macroscopic viscosity or elasticity with changes in molecular organization and chain dynamics.
Relaxation determines how quickly stretched or aligned chains lose the effects of an applied shear. If deformation changes on a timescale comparable to chain relaxation, the solution can display a pronounced elastic contribution; different timing produces a different balance between elastic and viscous behavior. This makes relaxation essential for interpreting shear-dependent measurements and predicting flow response.
A basic rheological workflow applies controlled shear to the solution and records the resulting response, such as viscosity or elasticity. Measurements can be repeated across shear conditions and compared for solutions with different concentration, molecular weight, solvent quality, or temperature. The resulting trends reveal how chain deformation and relaxation influence the material's flow and deformation.
The method supports decisions about how polymer-containing liquids will behave during processing and use. Its measurements inform the design of coatings, fibers, adhesives, and enhanced oil-recovery fluids, where flow and deformation affect performance. By linking molecular structure with measurable properties, researchers can evaluate whether a solution will exhibit the viscosity or elasticity needed for a particular application.
In physics, rheological data provide an indirect way to study chain dynamics and solution structure through bulk measurements of viscosity and elasticity. Changes caused by shear, concentration, molecular weight, solvent quality, or temperature can be interpreted in relation to stretching, alignment, entanglement, and relaxation. This connects molecular-scale behavior with transport and processing in complex fluids.