Abstract
During the last years, the use of photoinduced radical chain polymerization of unsatured monomers has increased considerably because of the vide applications of these processes in photoactive polymer-based systems. The present paper is mainly concerned with an investigation of the processes involved. For this purpose, time resolved laser spectroscopy (which appears to be a very convenient method for investigating directly the experimental behaviour of selectively excited chromophores) has been used. The utility of such a technique for the investigation of the primary processes which occur in the excited states of the photoinitiators immediately after the absorption of photons is demonstrated. As examples, main outlines corresponding to the classical processes observed in radical photoinitiated polymerization are considered and discussed: excited state processes in photoinitiators; mechanism of excitation transfer in combination of photosensitive systems; visible laser light induced polymerization; holographic recording.
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