STUDY ON THE POLYMERIZATION OF ACRYLONITRILE INITIATED BY POLYPROPYLENE-BASED VANADYL POLYIMIDODIACETATE——THIOUREA REDOX SYSTEM
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STUDY ON THE POLYMERIZATION OF ACRYLONITRILE INITIATED BY POLYPROPYLENE-BASED VANADYL POLYIMIDODIACETATE——THIOUREA REDOX SYSTEM
Vol. 7, Issue 3, Pages: 245-251(1989)
Affiliations:
1. Guangzhou Institute of Chemistry, Academia Sinica,Guangzhou
2. Academia Sinica
3. Guangzhou
Author bio:
Funds:
DOI:
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Published:20 September 1989
Accepted:
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[1]杨超雄,吴锦远,梁振明,冯灼权.STUDY ON THE POLYMERIZATION OF ACRYLONITRILE INITIATED BY POLYPROPYLENE-BASED VANADYL POLYIMIDODIACETATE——THIOUREA REDOX SYSTEM[J].Chinese Journal of Polymer Science,1989,{4}(03):245-251.
YANG Chaoxiong, Wu Jinyun, Liang Zhenming, et al. STUDY ON THE POLYMERIZATION OF ACRYLONITRILE INITIATED BY POLYPROPYLENE-BASED VANADYL POLYIMIDODIACETATE——THIOUREA REDOX SYSTEM[J]. 1989, 7(3): 245-251.
[1]杨超雄,吴锦远,梁振明,冯灼权.STUDY ON THE POLYMERIZATION OF ACRYLONITRILE INITIATED BY POLYPROPYLENE-BASED VANADYL POLYIMIDODIACETATE——THIOUREA REDOX SYSTEM[J].Chinese Journal of Polymer Science,1989,{4}(03):245-251.DOI:
YANG Chaoxiong, Wu Jinyun, Liang Zhenming, et al. STUDY ON THE POLYMERIZATION OF ACRYLONITRILE INITIATED BY POLYPROPYLENE-BASED VANADYL POLYIMIDODIACETATE——THIOUREA REDOX SYSTEM[J]. 1989, 7(3): 245-251.DOI:
STUDY ON THE POLYMERIZATION OF ACRYLONITRILE INITIATED BY POLYPROPYLENE-BASED VANADYL POLYIMIDODIACETATE——THIOUREA REDOX SYSTEM
The present paper deals with the kinetics of polymerization of acrylonitrile (AN) initialed by the redox system of polypropylene-based vanadyi polyimidodiacetate (PV)-thiourea (TU)in aqueous sulfuric acid in the temperature range from 25 to 40℃. The polymerization rate was measured by varying the concentrations of monomer
vanadyl polyimidodiacetate
thiourea and sulfuric acid. The overall rate of polymerization was summarized asRp=2.2×10
5
e
-6.560/RT
[AN]
1.0
[PV]
0.50
[TU]
1.5
[H
2
SO
4
]
2.0
The molecular weight of polyacrylonitrile based on the experimental data was:(?)=k 1/T [pv]
0.50
[TU]
1.5
[H
2
SO
4
]
2.0
These results indicated that the chain radicals are terminated by combination and/or disproportionation rather than chain transfer. The cooperation effect of carboxylic groups and the macromolecular field effect of polymer supporter are the characters of vanadyl polyimidodiacetate such as the case reported in early paper.
Abstract
The present paper deals with the kinetics of polymerization of acrylonitrile (AN) initialed by the redox system of polypropylene-based vanadyi polyimidodiacetate (PV)-thiourea (TU)in aqueous sulfuric acid in the temperature range from 25 to 40℃. The polymerization rate was measured by varying the concentrations of monomer
vanadyl polyimidodiacetate
thiourea and sulfuric acid. The overall rate of polymerization was summarized asRp=2.2×10
5
e
-6.560/RT
[AN]
1.0
[PV]
0.50
[TU]
1.5
[H
2
SO
4
]
2.0
The molecular weight of polyacrylonitrile based on the experimental data was:(?)=k 1/T [pv]
0.50
[TU]
1.5
[H
2
SO
4
]
2.0
These results indicated that the chain radicals are terminated by combination and/or disproportionation rather than chain transfer. The cooperation effect of carboxylic groups and the macromolecular field effect of polymer supporter are the characters of vanadyl polyimidodiacetate such as the case reported in early paper.
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