Salt effect of lithium bromide on the solution polymerization of acrylonitrile |
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| Authors: | Chuh‐Yung Chen Jen‐Feng Kuo Schon‐Youh Shieh Jih‐Gang Tornt |
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| Affiliation: | 1. Department of Chemical Engineering , National Cheng Kung University , Tainan, Taiwan, 70101, R.O.C.;2. Department of Chemistry , Chung Cheng Institute of Technology , Tahsi, Taiwan, 32023, R.O.C. |
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| Abstract: | Abstract In this paper, the salt effect of lithium bromide (LiBr) on the dimethyl formamid (DMF) solution polymerization of acrylonitrile was studied. From the experimental data, we proposed a possible mechanism and derived its rate expression to determine the kinetic parameters for this system. The results show that the values of kv/ktr (1.984～79.365) and kt/k2 tr (3.311×l02～3.156×l05 sec·mole/1) of the DMF‐LiBr solution polymerization of acrylonitrile are larger than those of the DMF‐LiCl solution polymerization of acrylonitrile shown by Bamford and others. These results can be explained by the basicity of salt and the dissociation of polyacrylonitrile in the DMF‐LiBr solution. |
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| Keywords: | salt effect LiBr kinetic parameters acrylonitrile |
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