Effect of electron-beam irradiation on the thermal vulcanization of a natural rubber compound
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 r...
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2019
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00218995_v136_n13_p_Esposito http://hdl.handle.net/20.500.12110/paper_00218995_v136_n13_p_Esposito |
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paper:paper_00218995_v136_n13_p_Esposito2023-06-08T14:42:59Z Effect of electron-beam irradiation on the thermal vulcanization of a natural rubber compound 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 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. 2019 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00218995_v136_n13_p_Esposito http://hdl.handle.net/20.500.12110/paper_00218995_v136_n13_p_Esposito |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
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 |
| spellingShingle |
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 Effect of electron-beam irradiation on the thermal vulcanization of a natural rubber compound |
| topic_facet |
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 |
| description |
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. |
| title |
Effect of electron-beam irradiation on the thermal vulcanization of a natural rubber compound |
| title_short |
Effect of electron-beam irradiation on the thermal vulcanization of a natural rubber compound |
| title_full |
Effect of electron-beam irradiation on the thermal vulcanization of a natural rubber compound |
| title_fullStr |
Effect of electron-beam irradiation on the thermal vulcanization of a natural rubber compound |
| title_full_unstemmed |
Effect of electron-beam irradiation on the thermal vulcanization of a natural rubber compound |
| title_sort |
effect of electron-beam irradiation on the thermal vulcanization of a natural rubber compound |
| publishDate |
2019 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00218995_v136_n13_p_Esposito http://hdl.handle.net/20.500.12110/paper_00218995_v136_n13_p_Esposito |
| _version_ |
1768546331750563840 |