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The antithixotropy of dilute solutions of copolymers of methyl methacrylate and methacrylic acid

✍ Scribed by Yu.N. Panov; O. Quadrat; M. Bohdanecký

Publisher
Elsevier Science
Year
1968
Tongue
English
Weight
372 KB
Volume
4
Category
Article
ISSN
0014-3057

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✦ Synopsis

Dilute solutions of methyl methacrylate-methacrylic acid copolymers (with low content o f methacrylic acid) in ethylene dichloride exhibit the effect of antithixotropy which manifests itself in the time dependence on the shear stress (in rotatory viscometers) and in the upturn on the shear stress dependence of viscosity (in capillary viscometers). The upturn vanishes at infinite dilution. Conditions for the appearance of the effect (polymer concentration, temperature, addition of dimethylformamide) ~ere investigated. The explanation of the effect is based on the assumption of strong intermolecular interaction brought about by hydrogen bonds.

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