Primary radical termination and unimolecular termination in the heterogeneous polymerization of acrylamide initiated by a fluorinated azo-derivative initiator: A kinetic study
✍ Scribed by Pierre Lebreton; Bernard Boutevin
- Publisher
- John Wiley and Sons
- Year
- 2000
- Tongue
- English
- Weight
- 188 KB
- Volume
- 38
- Category
- Article
- ISSN
- 0887-624X
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✦ Synopsis
Acrylamide was polymerized in acetonitrile at 82 °C with a perfluorinated azo-derivative initiator. The polymerization proceeded heterogeneously. Varying amounts of initiator and monomer were used. The activation energy was deduced from three experiments carried out at 59, 71, and 82 °C. The following kinetic law, deviating a great deal from the classical law, was obtained:
). These results can be interpreted in light of the contribution of primary radical termination and the emergence of occlusion. The development of a new kinetic relationship allowed us to confirm the existence of both of these termination reactions. The calculation of the k prt /k i ⅐ k p ratio was also achieved.