Viscoelastic Properties of Dilute Polymer Solutions (II)
نویسندگان
چکیده
منابع مشابه
Viscoelastic properties of polymer solutions.
In a concentrated polymer solution, the entanglement of long-chain molecules results in a transient network structure, to which may be attributed certain aspects of the viscoelastic behavior of such a system. A suitable mechanical model for representing this network as a first approximation is a retarded Maxwell element with one spring and two dashpots. Experimental measurements of mechanical p...
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The Rouse model has recently been modified to take into account the excluded volume interactions that exist between various parts of a polymer chain by incorporating a narrow Gaussian repulsive potential between pairs of beads on the Rouse chain (Prakash, 2000). The narrow Gaussian potential is characterized by two parameters: z∗ — which accounts for the strength of the interaction, and d∗ — wh...
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An oscillating capillary rheometer was used to investigate the dynamic viscoelastic and intrinsic viscosity properties of deacetylated xanthan (0.025%), native xanthan (0.025%), guar gum (0.075%), and xanthan–guar mixtures in dilute solutions. Influence of ionic strength on xanthan conformation and interaction with guar gum was elaborated. As the salt concentration increased, a significant (P <...
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We investigate theoretically and numerically the effect of polymer additives on two-dimensional turbulence by means of a viscoelastic model. We provide compelling evidence that, at vanishingly small concentrations, such that the polymers are passively transported, the probability distribution of polymer elongation has a power law tail: Its slope is related to the statistics of finite-time Lyapu...
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2014 Some properties of semi-dilute poor and good solvent polymer solutions are examined within the framework of the field-theoretic formulism. The uncontrollable polydispersivity inherent in the field-theoretic formulism is shown to produce no errors if the quantity under investigation is molecular weight independent. A renormalization group cross-over calculation correct to order 03B5 is perf...
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ژورنال
عنوان ژورنال: Kobunshi
سال: 1968
ISSN: 0454-1138,2185-9825
DOI: 10.1295/kobunshi.17.954