Radiation Synthesis and Characterization of Hydrogels Composed of Poly(vinyl alcohol) and Acrylamide Mixtures
| Autor: | Horia M. Nizam El-Din, Safaa G. Abd Alla, Abdel Wahab M. El-Naggar |
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| Rok vydání: | 2007 |
| Předmět: |
Thermogravimetric analysis
Vinyl alcohol Polymers and Plastics Chemistry Thermal decomposition Polyacrylamide General Chemistry chemistry.chemical_compound Monomer Chemical engineering Self-healing hydrogels Polymer chemistry Materials Chemistry Ceramics and Composites Thermal stability Interpenetrating polymer network |
| Zdroj: | Journal of Macromolecular Science, Part A. 44:47-54 |
| ISSN: | 1520-5738 1060-1325 |
| DOI: | 10.1080/10601320601044450 |
| Popis: | Hydrogels based on various compositions of poly(vinyl alcohol) (PVA) and acrylamide (AM) monomer were produced under the effect of γ‐irradiation. The hydrogels were characterized by IR spectroscopy and thermogravimetric analysis (TGA). In addition, the effect of temperature and pH on the swelling behavior was studied. It was proved that the composition of the final product corresponds to the initial composition of the preparing solutions. The IR spectroscopic analysis showed the formation of interpenetrating networks and the existence of hydrogen bonding. The thermal study and the calculation of activation energy of the thermal decomposition reaction of PVA/AM hydrogels showed that the PVA/AM hydrogels, over the studied compositions, possessed lower thermal stability than the individual polyacrylamide (PAM) hydrogel. The kinetic studies of swelling in water showed that the neat PAM and PVA/AM hydrogels reached equilibrium after six hours, while neat PVA polymer hydrogel reached equilibrium after three hou... |
| Databáze: | OpenAIRE |
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