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| Title: | Gamma irradiation effects on the kinetics of thermal decomposition of natural rubber and modified rubber by,carbon-black and cross-linking agents additives |
| Authors: | Alshehri, S.M.
Mahfouz, R.M.
Monshi, M.A.S.
Basfar, A.A.
Abd El-Salam, N.M. |
| Keywords: | Gamma irradiation
Thermal decomposition
Natural rubber
Modified rubber
Isothermal techniques |
| Issue Date: | 2003 |
| Citation: | Journal of Saudi Chemical Society: 7 (1); 41-46 |
| Description: | The kinetics of thermal decomposition bf natural rubber and modified rubber by carbon-black and crosslinking agents additives were studied over the temperature range (633-663 K) both for un-irradiated and pre-γ-irradiated of modified rubber and natural rubber with total dose of 10' Gy, in air using isothermal techniques. Kinetic analysis of %he results according to various theoretical models of solid state reaction showed that the decomposition of modified natural rubber was controlled by three-dimensional diffusion process. No change in the mechanism of decomposition was observed as a result of γ-irradiation, whereas an increase in the kinetic and thermodynamic values of the decomposition was recorded for pre-γ-irradiated samples. Addition of cross-linking agents to the carbon black modified rubber has significant effect on the kinetics values of thermal decomposition for the pre-γ-irradiated carbon-black modified
rubber.
Department of Chemistry, College of Science, King Saud University, P. 0. Box 2455, Riyadh-11451, Saudi Arabia. Tel. No. - Office (01) 4675971. Email: alshehri@ksu.edu.sa
Department of Chemistry, College of Science, King Saud University, P. 0. Box 2455, Riyadh-11451, Saudi Arabia. Tel. No. - Office (01) 4675971
Email: alshehri@ksu.edu.sa |
| URI: | http://hdl.handle.net/123456789/6538 |
| Appears in Collections: | College of Science
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