Artículo
Abstract:
The influence of electron-beam irradiation on the thermal vulcanization curing kinetics of a natural rubber compound was investigated by means of rheometric tests [moving die rheometry (MDR)] and differential scanning calorimetry (DSC). Differences in the storage moduli of compounds with different radiation doses were observed and assigned to a plasticizer effect by the zinc stearate mainly formed in the mixing stages; this compound migrated to the interphase region. This fact was confirmed by Fourier transform infrared spectroscopy. From the measurements performed by MDR and DSC testing, the induction time (to) was analyzed in the frame of the Claxton–Liska model, whereas the kinetic behavior of the nonirradiated and pre-irradiated compounds were satisfactorily fitted with the Isayev–Deng and Kamal–Ryan models. Additionally, both curing characterization techniques corroborated the fact that the pre-irradiated rubber compound showed an earlier to and a lower activation energy in comparison with the nonirradiated compound. These facts were attributed to the effect of irradiation on the free sulfur content present in the rubber compound, which promoted more activated precursor species to crosslink with rubber. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47216. © 2018 Wiley Periodicals, Inc.
Registro:
| Documento: | Artículo |
| Título: | Effect of electron-beam irradiation on the thermal vulcanization of a natural rubber compound |
| Autor: | Espósito, L.H.; Marzocca, A.J. |
| Filiación: | Research Group, FATE SAICI, Avenida Blanco Encalada 3003, San Fernando, Buenos Aires 1644GPK, Argentina Laboratorio de Polímeros y Materiales Compuestos, Departamento de Física, Universidad de Buenos Aires, Pabellón 1, Ciudad Universitaria, Buenos Aires C1428EHA,, Argentina |
| Palabras clave: | crosslinking; differential scanning calorimetry (DSC); elastomers; irradiation; kinetics; Activation energy; Calorimeters; Crosslinking; Curing; Differential scanning calorimetry; Elastomers; Electron beams; Enzyme kinetics; Fourier transform infrared spectroscopy; Irradiation; Kinetics; Vulcanization; Characterization techniques; Curing kinetics; Electron beam irradiation; Induction time; Interphase regions; Kinetic behavior; Sulfur contents; Zinc stearate; Rubber |
| Año: | 2019 |
| Volumen: | 136 |
| Número: | 13 |
| DOI: | http://dx.doi.org/10.1002/app.47216 |
| Título revista: | Journal of Applied Polymer Science |
| Título revista abreviado: | J. Appl. Polym. Sci. |
| ISSN: | 00218995 |
| CODEN: | JAPNA |
| Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00218995_v136_n13_p_Esposito |
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Citas:
---------- APA ----------
Espósito, L.H. & Marzocca, A.J. (2019) . Effect of electron-beam irradiation on the thermal vulcanization of a natural rubber compound. Journal of Applied Polymer Science, 136(13).http://dx.doi.org/10.1002/app.47216
---------- CHICAGO ----------
Espósito, L.H., Marzocca, A.J. "Effect of electron-beam irradiation on the thermal vulcanization of a natural rubber compound" . Journal of Applied Polymer Science 136, no. 13 (2019).http://dx.doi.org/10.1002/app.47216
---------- MLA ----------
Espósito, L.H., Marzocca, A.J. "Effect of electron-beam irradiation on the thermal vulcanization of a natural rubber compound" . Journal of Applied Polymer Science, vol. 136, no. 13, 2019.http://dx.doi.org/10.1002/app.47216
---------- VANCOUVER ----------
Espósito, L.H., Marzocca, A.J. Effect of electron-beam irradiation on the thermal vulcanization of a natural rubber compound. J. Appl. Polym. Sci. 2019;136(13).http://dx.doi.org/10.1002/app.47216
