Polymerization of N‐vinylpyrrolidone photoinitiated by azidopentamminecobalt(III) chloride

Kinetic study of azidopentaammine cobalt(III) complex as photoinitiator and termination agent ofN-vinylpyrrolidone radical polymerization

“…The azide radical was also found to react with vinyl monomers, inducing a free radical polymerization. 16,22,25,36 The mechanism for how this type of process may be formulated is now presented.…”

“…In the 1970s Kothandaraman et al 25 studied the polymerization of NVP induced by excitation of the azide cobalt(III) complex at wavelengths lower than 450 nm. In order to establish the mechanism involved in the polymerization process we undertook the study of the effect of the different parameters: the complex concentration, monomer concentration, absorbed light intensity (I a ), and excitation wavelength.…”