Preparation of highly concentrated inverse emulsions of acrylamide-based anionic copolymers as efficient water rheological modifiers
| Autor: | Atilano Gutiérrez Carrillo, Alberto F. Aguilera Alvarado, José Hernández Barajas, José González Rivera |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Polymers and Plastics Vacuum distillation Emulsion polymerization 02 engineering and technology 010402 general chemistry 01 natural sciences law.invention chemistry.chemical_compound law Polymer chemistry Materials Chemistry Distillation Acrylic acid chemistry.chemical_classification General Chemistry Polymer 021001 nanoscience & nanotechnology Polyelectrolyte 0104 chemical sciences Surfaces Coatings and Films Anionic addition polymerization chemistry Chemical engineering Emulsion 0210 nano-technology |
| Zdroj: | Journal of Applied Polymer Science. 133 |
| ISSN: | 0021-8995 |
| DOI: | 10.1002/app.43502 |
| Popis: | Highly concentrated inverse anionic polymeric emulsions (with a solid content of up to 63 wt %) were prepared using a two-step methodology: (i) First, acrylamide, acrylic acid, and its ammonium salts crosslinked copolymers were obtained by inverse emulsion polymerization, (ii) The water/volatile oil mixture was then separated from the heterogeneous system by vacuum distillation. To maintain sufficient stability during the reaction and distillation processes, a ternary surfactant mixture was used. A surface response methodology was employed to obtain the optimal values of the factors involved in both process and product specifications, and to maximize the high performance of these inverse anionic polymer emulsions. This yielded a product containing up to 63.2 wt % solids capable of achieving Brookfield viscosities as high as 40.3 Pa·s, using an aliquote of these concentrated inverse polymer emulsions (1.8 wt % in deionized water). Rheological characterization (oscillatory and rotational measurements) was carried out to evaluate the behavior of the diluted inverse anionic polymer emulsion in water thickening. The methodology developed can be used to formulate a wide range of viscoelastic (G″/G′) water-based products from anionic water soluble polymers. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43502. |
| Databáze: | OpenAIRE |
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