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Effect of Triplet Quenchers on the Photolysis of Poly(Vinyl Phenyl Ketone) in Film

R. Hrdlovič and I. Lukáč and Z. Maňásek

Institute of Polymers, Slovak Academy of Sciences, Bratislava 9

 

Abstract: The photolysis of poly(vinyl phenyl ketone) in film has been utilized to evaluate quenching efficiency of some aromatic hydrocarbons and different types of light stabilizers. The quenching efficiency was expressed as a slope of Stern—Volmer dependence. The quenching constants of aromatic hydrocarbons with first triplet level lower by 6 kcal mole-1 than first triplet level of poly(vinyl phenyl ketone) were about 2201 mole-1. No difference of quenching efficiency has been observed between naphthalene added to poly (vinyl phenyl ketone) and bonded in copolymer vinyl phenyl ketone 2-vinylnaphthalene. It has been concluded that the energy transfer along the polymer chain does not arise in poly(vinyl phenyl ketone) at room temperature. The quenching efficiency of u.v. absorbers was substantially higher than that of nickel chelates. Ferrocene has been found to be the only efficient quencher among metal chelates studied by this technique.

Full paper in Portable Document Format: 265a433.pdf

 

Chemical Papers 26 (5) 433–440 (1972)

Tuesday, November 29, 2022

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