Publications by authors named "Stefan van den Branden"

A remarkable and unexpected increase in the photopolymerization efficiency of an acrylic resin by a bisacylphosphine oxide photoinitiator was observed when an optical brightener was present in the medium. High values for the maximal rates of photopolymerization were obtained by RT-FTIR at 365 nm under a very low irradiance of 1 mW/cm. Fluorescence studies revealed that the quenching process occurs through singlet-singlet energy transfer between the first singlet excited state of the optical brightener and the ground state photoinitiator.

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