| Study on Kinetics during NR Reversion |
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| DOI： |
| Key Words: NR；reversion；vulcanization kinetics；computer-simulation |
| Author Name | Affiliation | | Gong Peng | Shanghai Jiaotong University | | Zhang Xiangfu | Shanghai Jiaotong University | | Zhang Yinxi | Shanghai Jiaotong University |
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| Abstract: |
| A model of the kinetics during NR reversion was proposed based on its reversion mechanism. The rate constants of different reactions were obtained by the computersimulation of vulcanization curves using the said model and thus the functional relationship between the poly-，di-or mono-sulfidic and broken crosslinks and the vulcanization time was derived. The simulated results showed that the simulated curves agreed well with the practical ones；and the relationship between the resultant rate constants and the vulcanization temperatures were in accordance with the Arrhenius equation. The activation energy of decomposition was higher than that of devulcanization，through which the fact that the hiher the vulcanization temperature，the heavier the reversion，was explained. |
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