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Photoinitiation. III. Polymerization of acrylonitrile photoinitiated by benzophenone in the presence of naphthalene

1975; Wiley; Volume: 13; Issue: 12 Linguagem: Inglês

10.1002/pol.1975.170131204

1542-9369

J. Capek, J. Bartoň,

Photopolymerization techniques and applications

Abstract The polymerization of acrylonitrile photoinitiated by radiation of wavelengths 313 and 365 nm in the presence of benzophenone and naphthalene was studied. If radiation of wavelength λ = 313 nm which is absorbed by naphthalene as well as by benzophenone is used, a decrease of the acrylonitrile polymerization rate and of the molecular weight of the polymer is observed in comparison with the polymerization taking place in the absence of benzophenone. If a radiation of wavelength (λ = 365 nm) at which only benzophenone is excited is used, addition of naphthalene to the system acrylonitrile–benzophenone enhances the polymerization rate. The reaction mechanism which accounts for the observed behavior of the acrylonitrile polymerization is discussed.