Über die polymerisation von acrylnitril mit silbernitrat

Abstract

ZUSAMMENFASSUNG:Die Polymerisation von Acrylnitril mit AgNO, in Substanz und in Losung wird untersucht. I n orientierenden kinetischen Versuchen wird gefunden, daB die Reaktion nach einem radikalischen Mechanismus ablauft ; sie wird durch Licht katalysiert. AuBerdem wird die Aktivitit einer Reihe anorganischer Salze und organischer Nitrate bei der Initiierung der Polymerisation gepriift. Die Reaktionsmoglichkeiten werden diskutiert. SUMMARY:The polymerization of acrylonitrile with AgNO, in bulk and in solution is investigated. Informative kinetic experiments are carried out and it is suggested that a radical mechanism is operative; light acts as a catalyst. A number of inorganic salts and organic nitrates is checked for initiator activity in the polymerization of acrylonitrile. A short discussion of the possible ways of the reaction is included.

Initiation of photopolymerization by charge transfer interactions

“…cationic initiation (26) VCZ + AgCIO4 -H2CLCH4 cationic initiation (27) The former is the oxidation of the benzene anion radical to prevent recombination of the cation radical with the anion radical. The latter is the stabilization of the cation radical to facilitate cationic initiation.…”

Photopolymerization of vinyl monomers

“…Other lanthanides in the +3 valence state also serve as sensitizers for photopolymerization (155,297). Soluble silver salts are photoinitiators for polymerization of acrylonitrile using near-ultraviolet radiation (290). It has been suggested that the initiation involves the photoreduction of Ag+ (289).…”