Solution properties of poly(acrylamide-co-3,5,5-trimethylhexane methacrylate) and its polyelectrolyte derivative
| Autor: | Marcos A. Villetti, Bruna V. Lima, Rosangela Regia Lima Vidal, Rosangela de Carvalho Balaban |
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| Rok vydání: | 2014 |
| Předmět: |
chemistry.chemical_classification
Polymers and Plastics Small-angle X-ray scattering Polymer Methacrylate Polyelectrolyte Colloid and Surface Chemistry chemistry Chemical engineering Ionic strength Polymer chemistry Materials Chemistry Radius of gyration Molar mass distribution Static light scattering Physical and Theoretical Chemistry |
| Zdroj: | Colloid and Polymer Science. 292:2123-2135 |
| ISSN: | 1435-1536 0303-402X |
| Popis: | The physicochemical properties of hydrophobically modified polyacrylamide (HAPAM) containing a small amount of hydrophobic groups (3,5,5-trimethylhexane methacrylate) and its partially hydrolyzed derivative (HAPAM-10N500) were investigated. The 13C spectrum was used to establish the degree of hydrolysis of HAPAM-10N500. Small-angle X-ray scattering (SAXS) was employed to highlight the polyelectrolyte character of HAPAM-10N500, estimate the chain conformation in the semidilute regime, and evaluate the influence of the ionic strength and the type of salt. The weight average molecular weight, the second virial coefficient, and radius of gyration were determined by static light scattering (SLS). The polymers showed different rheological properties in aqueous solution, with significant increase in viscosity due to partial hydrolysis of HAPAM, however, with strong dependence on ionic strength of the medium. Results showed that the polymers HAPAM and HAPAM-10N500 are suitable for application in processes of moderate temperatures and salinities. |
| Databáze: | OpenAIRE |
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