Synthèse et caractérisation d'un amorceur azoïque disulfonique. Application à la polymérisation de l'acide acrylique

✍ Scribed by Jean-Marie Bessière; Bernard Boutevin; Olivier Loubet; Yves Piétrasanta

• Publisher: John Wiley and Sons
• Year: 1994
• Tongue: English
• Weight: 467 KB
• Volume: 195
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.1994.021950303

✦ Synopsis

Abstract

The synthesis of a water‐soluble azo initiator was performed in four steps: action of hydrazinium sulfate onto 4‐phenylbutan‐2‐one followed by an addition of hydrogen cyanide onto the azine, then oxydation with bromine and finally chlorosulfonation of the obtained aromatic azo compound. The overall yield of this azo compound was about 40%. The kinetical and thermal parameters were determined by differential scanning calorimetry. The decomposition rate constant (k~d~) is similar to that of 2,2′‐azoisobutyronitrile (AIBN) but the activation energy (ca. 38 kJ/mol) is lower than that of AIBN. The polymerization with this initiator in aqueous medium has advantages as compared with Fenton's reagent.