The resinification of 2-ethenylfuran catalyzed by trifluroacetic acid in water–chloroform mixtures
| Autor: | Pedro Ortiz, Regino González, E. González, Jacques Rieumont, Mayra González |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
chemistry.chemical_classification
Condensation polymer Polymers and Plastics Organic Chemistry Polymer Active center chemistry.chemical_compound Chain-growth polymerization Monomer chemistry Polymerization Polymer chemistry Materials Chemistry Trifluoroacetic acid Organic chemistry Steady state (chemistry) |
| Zdroj: | Polymer. 41:2491-2498 |
| ISSN: | 0032-3861 |
| DOI: | 10.1016/s0032-3861(99)00380-8 |
| Popis: | The 2-ethenylfuran polymerization catalyzed by trifluoroacetic acid in a water–chloroform mixture yields oligomers at the beginning and products at higher reaction times. Some features of the polymerization resemble a polycondensation process such as molecular weight increasing with time. Polymers obtained were characterized and its structure did not differ from those obtained with 1 (2-furyl) 1-ethanol. Thus, a vinylic propagation can be ruled out. However, the monomer concentration decreased steadily during polymerization and the kinetic first order in monomer and catalyst could only be explained assuming a steady state for the polarized ester concentration, which is the active center that gives the corresponding carbinol. Both of these facts suggest a chain reaction. Computer simulation helped to confirm the envisaged mechanism for this system. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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