The determination of Stern-Volmer constants in polymer systems

The inhibition of main chain scission of carbonyl polymers and sensitization of biacetyl phosphorescence by carbonyl polymers were employed for determination of Stern-Volmer quenching constants. Fairly good agreement was found between these two methods. Both methods are sensitive to impurities especially when Stern-Volmer constants exceed 1000 l/mole. The differences between quenching of the excited state of the chromophore bound in high polymers and in low molecular substance are discussed.