Photopolymerization in the System Oligomer–Aromatic Nitro Compound–Aniline Derivative

Abstract

Photopolymerization of acrylic oligomer was studied in the presence of an aromatic nitro compound coupled with dialkylaniline derivatives. Photopolymerization efficiency was shown to significantly increase upon introducing bromine atoms into the structure of an aniline derivative or molecules of the reaction medium. Triplet photosensitizers have a similar effect. Growing macroradicals were detected by the spin trapping technique. A polymerization photoinitiation mechanism was suggested, which is based on the formation of a triplet complex of the nitro compound with the tertiary amine followed by its decomposition into radical products.