Tailoring the mechanical properties of polyacrylamide-based hydrogels
| Autor: | Bryan A. Baker, Valeria T. Milam, Rebecca Murff |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Organic Chemistry Polyacrylamide Polyacrylic acid technology industry and agriculture Dynamic mechanical analysis Polymer Polyelectrolyte chemistry.chemical_compound chemistry Self-healing hydrogels Materials Chemistry Copolymer medicine Composite material Swelling medicine.symptom |
| Zdroj: | Polymer. 51:2207-2214 |
| ISSN: | 0032-3861 |
| DOI: | 10.1016/j.polymer.2010.02.022 |
| Popis: | Here, we studied the mechanical properties of polyacrylic acid-co-polyacrylamide (pAAc/pAAm) and polyacrylate-co-polyacrylamide (pNaAc/pAAm)-based hydrogels as a function of composition and total polymer content. While both polyacrylate and polyacrylic acid are weakly-charged polyelectrolytes with carboxylate side groups, they exhibit different behavior as copolymers with polyacrylamide. In swelling studies the highest degree of volumetric expansion occurs in the polyacrylate-rich hydrogels. Rheological measurements indicate that the shear storage modulus of the hydrogels typically increases with the percentage of polyacrylamide for a given polymer volume fraction; however, the simultaneous strengthening and embrittling effects of polyacrylamide as a copolymer are more dramatic for the pNaAc/pAAm hydrogels. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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