Radical polymerization of acrylonitrile initiated by α-picolinium p-chlorophenacylid
| Autor: | Anju Dixit, S. Malik, Sarvagya S. Katiyar |
|---|---|
| Rok vydání: | 1995 |
| Předmět: |
Kinetic chain length
Polymers and Plastics Bulk polymerization Chemistry Organic Chemistry Radical polymerization Chain transfer macromolecular substances Photochemistry Living free-radical polymerization Cobalt-mediated radical polymerization Polymer chemistry Materials Chemistry Precipitation polymerization Ionic polymerization |
| Zdroj: | Polymer International. 37:287-290 |
| ISSN: | 1097-0126 0959-8103 |
| DOI: | 10.1002/pi.1995.210370407 |
| Popis: | The radical polymerization of acrylonitrile (AN) with α-picolinium p-chlorophenacylid (α-PCPY) as initiator using carbon tetrachloride as inert solvent was investigated at 50°C. The polymerization follows ideal kinetics: the exponent values calculated for the initiator and monomer were found to be 0.5 and unity, respectively. A free radical mechanism with bimolecular termination was confirmed by the inhibiting effect of hydroquinone, a radical quencher. The rate of polymerization was a direct function of initiator (α-PCPY) concentraction, monomer (AN) concentration and temperature. The overall activation energy calculated was 56 kJ/mol. The polymerization was favoured by polar solvents and retarded by non-polar solvents. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Plný text