Title: Dye-sensitized Photopolymerization of Vinyl Monomers. I. Preliminary Report on the Polymerization of Acrylonitrile by Various Dyes
Abstract: Abstract Among various dyes, the dyes suitable for the sensitization of the polymerization of acrylonitrile have been determined. Acridine and xanthene dyes have been found to be the most effective. Using acridine yellow, one of the most effective, the dye-sensitized photopolymerization has been investigated in detail; it has been shown that the reaction has several features characteristic of heterogeneous polymerization, e.g., its order is higher than one-and-a-half on monomer concentration. Assuming the initiation process to be a direct interaction between excited dye and monomer, and assuming the unimolecular termination by occlusion of the propagating radicals, the kinetic data has been interpreted.