The influence of montmorillonite content on the kinetics of curing of epoxy nanocomposites
In this work, the attention was paid at the investigation of montmorillonite dispersion in epoxy/amine systems due to improved final properties of the nanocomposites. The influence of different montmorillonite content on the kinetics of curing of epoxy/Jeffamine D-230 systems was followed by dif...
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| Format: | Article |
| Language: | English |
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Association of Chemical Engineers of Serbia
2012-01-01
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| Series: | Hemijska Industrija |
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| Online Access: | http://www.doiserbia.nb.rs/img/doi/0367-598X/2012/0367-598X1200111J.pdf |
| _version_ | 1811294308577312768 |
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| author | Jovičić Mirjana C. Bera Oskar J. Pavličević Jelena M. Simendić Vesna B. Radičević Radmila Ž. |
| author_facet | Jovičić Mirjana C. Bera Oskar J. Pavličević Jelena M. Simendić Vesna B. Radičević Radmila Ž. |
| author_sort | Jovičić Mirjana C. |
| collection | DOAJ |
| description | In this work, the attention was paid at the investigation of montmorillonite dispersion in epoxy/amine systems due to improved final properties of the nanocomposites. The influence of different montmorillonite content on the kinetics of curing of epoxy/Jeffamine D-230 systems was followed by differential scanning calorimetry (DSC). The curing of epoxy nanocomposites was performed using dynamic regime at three different heating rates: 5, 10 and 20°C/min. Three isoconversional methods were applied: two integral (Ozawa-Flynn-Wall and Kissinger-Akahira-Sunose methods) and one differential (Friedman method). The presence of montmorillonite (MMT) causes the beginning of curing at lower temperatures. The shape of the DSC curves has been changed by the addition of MMT, supporting the hypothesis of a change in the reaction mechanism. For hybrids with 3 and 5 wt.% of MMT, the Eα dependence is very similar to those found for the reference system (epoxy/Jeffamine D-230) for the curing degree less than 60%. The hybrid with 10 wt.% of MMT has lower energy activation in regard to the referent system without montmorillonite. Greater differences are observed in the second part of the reaction, where it is known that the curing process is more controlled by diffusion (α>0.60). The Ea value increases at the end of the reaction (α→1), which was observed for all systems, and is more pronounced in the presence of montmorillonite. [Projekat Ministarstva nauke Republike Srbije, br. III45022] |
| first_indexed | 2024-04-13T05:15:34Z |
| format | Article |
| id | doaj.art-56b14ced8e1d4606b98835fdc696ddc9 |
| institution | Directory Open Access Journal |
| issn | 0367-598X |
| language | English |
| last_indexed | 2024-04-13T05:15:34Z |
| publishDate | 2012-01-01 |
| publisher | Association of Chemical Engineers of Serbia |
| record_format | Article |
| series | Hemijska Industrija |
| spelling | doaj.art-56b14ced8e1d4606b98835fdc696ddc92022-12-22T03:00:54ZengAssociation of Chemical Engineers of SerbiaHemijska Industrija0367-598X2012-01-0166686387010.2298/HEMIND120814111JThe influence of montmorillonite content on the kinetics of curing of epoxy nanocompositesJovičić Mirjana C.Bera Oskar J.Pavličević Jelena M.Simendić Vesna B.Radičević Radmila Ž.In this work, the attention was paid at the investigation of montmorillonite dispersion in epoxy/amine systems due to improved final properties of the nanocomposites. The influence of different montmorillonite content on the kinetics of curing of epoxy/Jeffamine D-230 systems was followed by differential scanning calorimetry (DSC). The curing of epoxy nanocomposites was performed using dynamic regime at three different heating rates: 5, 10 and 20°C/min. Three isoconversional methods were applied: two integral (Ozawa-Flynn-Wall and Kissinger-Akahira-Sunose methods) and one differential (Friedman method). The presence of montmorillonite (MMT) causes the beginning of curing at lower temperatures. The shape of the DSC curves has been changed by the addition of MMT, supporting the hypothesis of a change in the reaction mechanism. For hybrids with 3 and 5 wt.% of MMT, the Eα dependence is very similar to those found for the reference system (epoxy/Jeffamine D-230) for the curing degree less than 60%. The hybrid with 10 wt.% of MMT has lower energy activation in regard to the referent system without montmorillonite. Greater differences are observed in the second part of the reaction, where it is known that the curing process is more controlled by diffusion (α>0.60). The Ea value increases at the end of the reaction (α→1), which was observed for all systems, and is more pronounced in the presence of montmorillonite. [Projekat Ministarstva nauke Republike Srbije, br. III45022]http://www.doiserbia.nb.rs/img/doi/0367-598X/2012/0367-598X1200111J.pdfepoxymontmorilloniteDSCcuring kineticsisoconversional methods |
| spellingShingle | Jovičić Mirjana C. Bera Oskar J. Pavličević Jelena M. Simendić Vesna B. Radičević Radmila Ž. The influence of montmorillonite content on the kinetics of curing of epoxy nanocomposites Hemijska Industrija epoxy montmorillonite DSC curing kinetics isoconversional methods |
| title | The influence of montmorillonite content on the kinetics of curing of epoxy nanocomposites |
| title_full | The influence of montmorillonite content on the kinetics of curing of epoxy nanocomposites |
| title_fullStr | The influence of montmorillonite content on the kinetics of curing of epoxy nanocomposites |
| title_full_unstemmed | The influence of montmorillonite content on the kinetics of curing of epoxy nanocomposites |
| title_short | The influence of montmorillonite content on the kinetics of curing of epoxy nanocomposites |
| title_sort | influence of montmorillonite content on the kinetics of curing of epoxy nanocomposites |
| topic | epoxy montmorillonite DSC curing kinetics isoconversional methods |
| url | http://www.doiserbia.nb.rs/img/doi/0367-598X/2012/0367-598X1200111J.pdf |
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