| TERMINATION AND TRANSFER OF THE CHAIN RADICALS IN THE POLYMERIZATION OF ACRYLONITRILE INITIATED BY VANADIUM(V)-THIOUREA REDOX SYSTEM |
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| 作者姓名： | 吴锦远 杨超雄 吴宇贤 |
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| 作者单位： | Guangzhou Institute of Chemistry，Academia Sinica，Guangzhou Institute of Chemistry，Academia Sinica，Guangzhou Institute of Chemistry，Academia Sinica Guangzhou，Guangzhou，Guangzhou |
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| 摘 要： | The dependence of the molecular weights on the concentration of reactants in the polymerization of acrylonitrile initiated by vanadium (V)-thiourea redox system has been investigated. It was found that the molecular weights of the polymer change nonlinearly with increasing concentrations of nitric acid and thiourea. Probably, the composition of the complexes exert a great influence on the chain initiation and termination. The reaction of "complextermination" gives rise to the decrease of the molecular weights markedly while the concentrations of thiourea and vanadium (V)in the range from one to three molar ratios.
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| 收稿时间： | 1989-11-04 |
TERMINATION AND TRANSFER OF THE CHAIN RADICALS IN THE POLYMERIZATION OF ACRYLONITRILE INITIATED BY VANADIUM(V)-THIOUREA REDOX SYSTEM |
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| WU Jinyuan,YANG Chaoxiong,WU Yuxian.TERMINATION AND TRANSFER OF THE CHAIN RADICALS IN THE POLYMERIZATION OF ACRYLONITRILE INITIATED BY VANADIUM(V)-THIOUREA REDOX SYSTEM[J].Chinese Journal of Polymer Science,1990,0(4):312-320. |
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| Authors: | WU Jinyuan YANG Chaoxiong WU Yuxian |
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| Institution: | Guangzhou Institute of Chemistry; Academia Sinica; Academia Sinica Guangzhou; Guangzhou |
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| Abstract: | The dependence of the molecular weights on the concentration of reactants in the polymerization of acrylonitrile initiated by vanadium (V)-thiourea redox system has been investigated. It was found that the molecular weights of the polymer change nonlinearly with increasing concentrations of nitric acid and thiourea. Probably, the composition of the complexes exert a great influence on the chain initiation and termination. The reaction of "complextermination" gives rise to the decrease of the molecular weights markedly while the concentrations of thiourea and vanadium (V)in the range from one to three molar ratios. |
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| Keywords: | Acrylonitrile Vanadium-Thiourea redox system Polymerization kinetics Molecular weight Chain transfer Termination of radicals |
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