Synthesis and characterization of methyl methacrylate - glycerol hydrogels by polymerization in acid medium
Síntesis y caracterización de hidrogeles de glicerol-metacrilato obtenido por polimerización en medio acido
Síntese e caraterização de hidrogéis de glicerol-metacrilato obtidos por polimerização em meio ácido
| 2024 | |
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Poli (metil metacrilato) Glicerol Ácido sulfúrico Ácido cítrico Entrecruzamiento Poly (methyl methacrylate) Glycerol Sulfuric acid Citric acid Cross Linking Poli (metacrilato de metilo) Glicerol Ácido sulfúrico Ácido cítrico Reticulação |
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| Español | |
| Universidad de Montevideo | |
| REDUM | |
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https://revistas.um.edu.uy/index.php/ingenieria/article/view/1415
https://hdl.handle.net/20.500.12806/3391 |
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| Acceso abierto | |
| Atribución 4.0 Internacional |
| Sumario: | Hydrogels were prepared from methyl methacrylate, glycerol, and sulfuric or citric acid. A novel route for the synthesis of crosslinked materials using unconventional initiators was evaluated using a 23 factorial experimental design. Effects of independent variables (polymerization time, type, and acid concentration) were statistically analyzed through ANOVA. The synthesis route includes condensation, free-radical and transesterification reactions with modifications of the polymer chemical properties such as the formation of a crosslinking polyester with polymethylmethacrylate (PMMA) and improvement of the mechanical and thermal properties of the hydrogel. A polymerization time of 4-hour produced the highest amount of material when 1.37 g sulfuric acid was used and 3.46 g when citric acid was added. The polymer synthesized with citric acid has a swelling rate up to 214.6%, compared with the materials produced with sulfuric acid that reach up to 31.3% of water absorption. |
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