KINETICS OF POLYMERIZATION OF ACRYLONITRILE INITIATED BY VANADIUM(V)-THIOUREA REDOX SYSTEM

WU Jinyuan; YANG Chaoxiong; WU Yuxian

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KINETICS OF POLYMERIZATION OF ACRYLONITRILE INITIATED BY VANADIUM(V)-THIOUREA REDOX SYSTEM

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- KINETICS OF POLYMERIZATION OF ACRYLONITRILE INITIATED BY VANADIUM(V)-THIOUREA REDOX SYSTEM
- Vol. 8, Issue 4, Pages: 302-311(1990)
- Affiliations：
  
  1. Guangzhou Institute of Chemistry, Academia Smica,Guangzhou
  2. Academia Sinica
  3. Academia Sinica Guangzhou
- Author bio：
- Funds：
- DOI：
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- Published：20 December 1990
- Accepted：
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[1]吴锦远,杨超雄,吴宇贤.KINETICS OF POLYMERIZATION OF ACRYLONITRILE INITIATED BY VANADIUM(V)-THIOUREA REDOX SYSTEM[J].Chinese Journal of Polymer Science,1990,{4}(04):302-311.

WU Jinyuan, YANG Chaoxiong, WU Yuxian. KINETICS OF POLYMERIZATION OF ACRYLONITRILE INITIATED BY VANADIUM(V)-THIOUREA REDOX SYSTEM[J]. 1990, 8(4): 302-311.
[1]吴锦远,杨超雄,吴宇贤.KINETICS OF POLYMERIZATION OF ACRYLONITRILE INITIATED BY VANADIUM(V)-THIOUREA REDOX SYSTEM[J].Chinese Journal of Polymer Science,1990,{4}(04):302-311. DOI：

WU Jinyuan, YANG Chaoxiong, WU Yuxian. KINETICS OF POLYMERIZATION OF ACRYLONITRILE INITIATED BY VANADIUM(V)-THIOUREA REDOX SYSTEM[J]. 1990, 8(4): 302-311. DOI：

摘要

正

The kinetics of polymerization of acrylonitrile （AN） initiated by quinquevalent vanadium (V

)-thiourea （TU） redox system has been investigated in aqueous nitric acid in the temperature range from 30 to 50℃. The polymerization rate （R

） can be expressed as follows: In the copolymerization of acryionitrile with methyl acrylate （MA）

the reactivity ratios were found to be 1.0 and 1.1

respectively. The experimental observations suggest that the initiating species is probably a complex consisting of a central ion of Lewis acid-VO

and the ligands of Lewis bases-acrylonitrile

thiourea

and nitrate anions

while the initiating system in lower concentration

the polymerization of acrylonitrile does not occur if the thiourea is acidified prior to its reaction with quinquevalent vanadium. This indicates that the primary radicals （or the monomeric radicals in the present article） are produced by associated thiourea rather than isothlourea.

Abstract

The kinetics of polymerization of acrylonitrile （AN） initiated by quinquevalent vanadium (V

)-thiourea （TU） redox system has been investigated in aqueous nitric acid in the temperature range from 30 to 50℃. The polymerization rate （R

） can be expressed as follows: In the copolymerization of acryionitrile with methyl acrylate （MA）

the reactivity ratios were found to be 1.0 and 1.1

respectively. The experimental observations suggest that the initiating species is probably a complex consisting of a central ion of Lewis acid-VO

and the ligands of Lewis bases-acrylonitrile

thiourea

and nitrate anions

while the initiating system in lower concentration

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