Kinetics of radical polymerization—XXXII. Determination of the rate of initiation in bulk polymerization of acrylonitrile

✍ Scribed by Á. Rehák; F. Tüdös

• Publisher: Elsevier Science
• Year: 1980
• Tongue: English
• Weight: 358 KB
• Volume: 16
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(80)90210-4

✦ Synopsis

A study was made of the possibility of applying three chemically different types of free radicals for determination of the rate of initiation in the heterogeneous polymerization of acrylonitrile (AN) initiated by AIBN. The Banfield-Kenyon radical showed accelerating decay in acrylonitrile. Between triphenylverdazyl (TPV) and AN a thermal reaction occurs. The rate of initiation however can be determined by taking account of this reaction. By photometric and kinetic investigations, no thermal reaction between 1,1-diphenyl-2-(2,6-dinitrophenyl)-hydrazyl (DPDH) and AN could be observed at 60 ° or lower temperatures. The rate of initiation was determined also with DPDH by inhibition kinetic method. The values obtained with TPV and with DPDH are in very good agreement.