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Rheological properties of lightly crosslinked carboxy copolymers in aqueous solutions

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Abstract

The rheological properties of a series of lightly crosslinked carboxy copolymers in aqueous solutions have been evaluated in steady shear and dynamic oscillatory modes. Viscosity profiles and the behavior of storage modulus are related to the chemical composition of the copolymers and their crosslinking density. A maximum in viscosity and in storage modulus which depends on the type of crosslinking agent used is explained by a combination of a chain entanglement mechanism and a closely-packed spheres model. The recovery of viscosity and storage modulus after shearing is very fast and is related to the very fast rearrangement of the microgel structure as a function of time.

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  1. H. N. Naé & W. W. Reichert

    Present address: RHEOX, Inc., P.O.Box 700, 08520, Hightstown, NJ, USA

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    1. H. N. Naé
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    2. W. W. Reichert
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    Naé, H.N., Reichert, W.W. Rheological properties of lightly crosslinked carboxy copolymers in aqueous solutions. Rheola Acta 31, 351–360 (1992). https://doi.org/10.1007/BF00418332

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    • DOI: https://doi.org/10.1007/BF00418332

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