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2011, Volume 5, Issue 1

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Frontiers of Chemical Science and Engineering >> 2011, Volume 5, Issue 1 doi: 10.1007/s11705-010-0548-z

Rheological behavior of PMVE-MA aqueous solution with metallic cations

State Key Laboratory of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China

Available online: 2011-03-05
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Abstract

The rheological properties of aqueous solutions of poly(methyl vinyl ether-co-maleic anhydride) (PMVE-MA) upon addition of metallic cations at different pH values were investigated. Sol-gel transition and shear-thickening phenomena at moderate shear rate were observed upon increasing the amount of metallic cations, especially for cupric cation. At certain molar ratio ( ) of added cupric cations to carboxyl groups in PMVE-MA, the system became gel-like, and the storage modulus (G′) and loss modulus (G′′) were parallel and exhibited a power-law dependence on the frequency, which is consistent with Winter’s hypothesis of determining the gel point of a crosslinking system. The shear-thickening behavior depends on , pH, metallic valence, and temperature.

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