Kinetic Analysis of Isothermal and Nonisothermal Epoxy-Amine Cures by Model-Free Isoconversional Methods
| Autor: | Jean-Louis Vernet, François Xavier Perrin, Thi Minh Hanh Nguyen |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Bisphenol A
Polymers and Plastics Organic Chemistry Kinetics technology industry and agriculture Thermodynamics Epoxy Activation energy Condensed Matter Physics Isothermal process Catalysis chemistry.chemical_compound Differential scanning calorimetry chemistry Diamine visual_art Polymer chemistry Materials Chemistry visual_art.visual_art_medium Physical and Theoretical Chemistry |
| Zdroj: | Macromolecular Chemistry and Physics. 208:718-729 |
| ISSN: | 1521-3935 1022-1352 |
| DOI: | 10.1002/macp.200600614 |
| Popis: | Model-free and model-fitting kinetic approaches were applied to isothermal and nonisothermal DSC data on epoxy cure. The dependence of the effective activation energy on the extent of cure was determined using integral and differential isoconversional methods. A different shape of the dependence in the kinetically controlled regime (α < 0.4) was found when compared to the dependence typically reported for epoxy-amine systems. This result was shown to arise from the presence of low amounts of bisphenol A in the present epoxy that 8 are efficient catalysts for epoxy amine reaction. A model-free method prediction of isothermal cure from isothermal data has also been considered. |
| Databáze: | OpenAIRE |
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