2 edition of Viscosity of polymer solutions found in the catalog.
Viscosity of polymer solutions
Includes bibliographical references and indexes.
|Statement||Miloslav Bohdanecký and Josef Kovář.|
|Series||Polymer science library ;, 2|
|Contributions||Kovář, Josef, 1944-|
|LC Classifications||QD381.8 .B63 1982|
|The Physical Object|
|Pagination||xii, 285 p. :|
|Number of Pages||285|
|LC Control Number||82002336|
The Viscosity of Polymers and Their Concentrated Solutions Chapter in Advances in Polymer Science May with Reads How we measure 'reads'. CHEM Experiment 6 Viscosity of High Polymer Solutions A polymer is a large molecule (macromolecule) composed of many simple units that are called repeating units. A single polymer molecule may consist of hundreds to a million monomers and may have a File Size: KB.
Viscosity, resistance of a fluid (liquid or gas) to a change in shape, or movement of neighbouring portions relative to one another. Viscosity denotes opposition to flow. The reciprocal of the viscosity is called the fluidity, a measure of the ease of flow. Molasses, for example, has a greater viscosity than water. Because part of a fluid that. The viscosity of a fluid is a measure of its resistance to deformation at a given rate. For liquids, it corresponds to the informal concept of "thickness": for example, syrup has a higher viscosity than water. Viscosity can be conceptualized as quantifying the internal frictional force that arises between adjacent layers of fluid that are in relative symbols: η, μ.
A simple liquid viscosity model for multicomponent mixtures containing polymers is presented. This model is essentially a new mixing rule for calculating the Newtonian viscosity of mixtures over the entire composition range using the pure-component viscosities. A modified Mark−Houwink model is applied to calculate the Newtonian viscosity of pure polymer melts, and the Andrade/DIPPR Cited by: Buy Viscosity of Polymer Solutions (Polymer science library) on FREE SHIPPING on qualified ordersCited by:
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Important role in understanding the effect of macromolecular structure on the dynamics of polymer solutions. Viscosity of Polymer Solutions A molecular interpretation was proposed for the dependence of the viscosity of polymer solutions on molecular weight at different temperatures and concentrations.
Summary Intrinsic Viscosity. is a measure for the internal friction in polymer solutions at the limit of zero polymer concentration.
Thus, this quantity describes the effect of completely separated polymer chains on the solution viscosity. The viscosity-radius relationship for concentrated polymer solutions Dave E. Dunstan Department of Chemical Engineering, University of Melbourne, VICAustralia.
[email protected] A key assumption of polymer physics is that the random chains polymers extend in flow. in which n is the viscosity of a polymer solution of concentration C and η0 is the viscosity of the pure solvent. It should be emphasized that the application of Equation 1 to aqueous solutions of polymer flocculants is approximate at best since it is by no means clear.
The intrinsic viscosity (IV) is related to the molecular weight of the polymer through the Mark-Houwink relationship .The technique used to perform IV measurements is described in ASTM D and DA Ubbelohde No.
1 viscometer, as shown in Figureis placed in an oil bath at ° polymer powder is dissolved in decahydronaphthalene at °C with a volume of solvent in. Viscosity of Polymer Solutions Part II: Viscosity of Concentrated Solutions.
The viscosity of dilute and concetrated polymer solutions has been studied for many decades and has played an important role in understanding the effect of macromolecular structure on the dynamics of polymer solutions. Today, a huge amount of data can be found in the. Additional Physical Format: Online version: Bohdanecký, Miloslav, Viscosity of polymer solutions.
Amsterdam ; New York: Elsevier Scientific Pub. Co., In multi-concentration measurements polymer solutions with different concentrations are ing on the regression afterwards, the specific, reduced, or inherent viscosity is determined from these solutions.
The determined viscosity is then plotted against the concentration of the investigated polymer solutions. The intersection with the y-axis gives the intrinsic viscosity.4/5(40).
Rheology Solutions offers a comprehensive exclusive selection of products from the leading manufacturers across material testing instruments, polymer testing instruments, process rheometers, process viscometers, rheometers, sensor systems for rheometers and viscometers, twin screw extruders, temperature control, and viscometers.
VISCOSITY OF POLYMER SOLUTIONS REVISITED S. Matsuoka and M. Cowman Polymer Research Institute, Polytechnic University, Six Metrotech Center, Brooklyn, New YorkUSA. ABSTRACT A rubbery sphere as a hydrodynamic model for the polymer molecule is useful in predicting many aspects of the solution behavior, but it has some inconsistencies Cited by: The dynamic viscosity of different long chain polymers in Aroclor permits an easy extrapolation to zero concentration only in the limiting cases of Newtonian, i.
e., constant viscosity at low and high frequency, respectively. The first intrinsic viscosity [η]0 is independent of any concept of the internal viscosity. In the case of polystyrene it is proportional toM 0,65 which shows that Cited by: 9. A key assumption used in the models of polymer dynamics and rheology is that the chains extend in the flow to reduce the viscosity and imbue the solution with Cited by: 2.
This test method covers the determination of the solution viscosity of polymers using a differential or the modified differential viscometer. It is applicable to all polymers that dissolve completely without chemical reaction or degradation to form solutions that are stable with time and temperature.
Polymer Solutions’ team can conduct viscosity testing on any polymer, including common medical device polymers such as polyethylene, polycarbonate, hydrogel, thermoplastic elastomers and more.
With this testing, we can help you better understand if your medical device or other product made from polymers will function as intended. Polymer Solutions: An Introduction to Physical Properties offers a fresh, inclusive approach to teaching the fundamentals of physical polymer science. Students, instructors, and professionals in polymer chemistry, analytical chemistry, organic chemistry, engineering, materials, and textiles will find Iwao Teraoka’s text at once accessible and Cited by: For viscoelastic fluids such as polymer melts and solutions, the transient uniaxial extensional viscosity is a function of both the rate of stretching and the total deformation or strain imposed.
Knowledge of the resulting material function is of great importance in governing the dynamics and. Dynamics of Polymer Solutions Dynamic Light Scattering and Diffusion of Polymers Measurement System and Autocorrelation Function Viscosity of a Fluid Viscosity of a Solution Measurement of Viscosity.
The solution will now be of high viscosity of perhaps cps and should be fed with a high viscosity diaphragm pump, gear pump, or progressive cavity pump. It can be fed into the point of slow mixing directly, or for higher efficiency it can be pumped into carrier water to further uncoil the polymer before it enters the slow mix zone orFile Size: KB.
For polymers meeting the restrictions ofempirical relationships can be developed between the dilute solution viscosity of a polymer and its hydrodynamic volume or average chain dimension (radius of gyration or end-to-end distance).Such relationships depend upon any variables influencing this molecular size of the dissolved polymer.
The most important of these variables are solvent. The large extensional viscosity of dilute polymer solutions has been shown to dramatically delay the breakup of jets into drops. For low shear viscosity solutions, the jet breakup is initially.
In fact, viscosity measurements of polymer solutions are another way to determine the size of the polymer -- leading to the chain length and the molecular weight. The larger the polymer, the more drag and also the more intermolecular attraction, and so the higher the viscosity.
There are three different types of viscosity: shear viscosity caused by shearing, exten‐sional viscosity caused by elongation, and volume viscosity caused by hydrostatic pressure.
Viscometry of dilute polymer solutions is only concerned with the first of these three : Hans‐Georg Elias.The viscosity we want is the Relative Viscosity, η r which is that of the polymer solution η p divided by that of the pure solvent η s.
We want to know how it depends on concentration, C, (in units of g/dl, i.e. g/ml which is ~ weight %) up to a maximum value, C max.