Premium
Excited state processes in photoinitiators of polymerization in microheterogeneous media
Author(s) -
Lougnot DanielJoseph,
Fouassier JeanPierre
Publication year - 1990
Publication title -
makromolekulare chemie. macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 0258-0322
DOI - 10.1002/masy.19900310107
Subject(s) - photopolymer , cationic polymerization , polymerization , photochemistry , excited state , micelle , spectroscopy , radical polymerization , chemistry , photodissociation , microemulsion , methyl methacrylate , materials science , polymer chemistry , polymer , organic chemistry , pulmonary surfactant , aqueous solution , atomic physics , biochemistry , physics , quantum mechanics
A comprehensive investigation of the photopolymerization in microheterogeneous structure is carried out with a view to elucidate the role played by the excited states in the initiation process. The radical initiation of methyl methacrylate in either anionic or cationic micelles or of acrylamide in reverse microemulsion is thus examined by UV spectroscopy, steady state photolysis and time resolved laser spectroscopy. The question of the localization of the initiator is dealt with special attention. Moreover, the influence of several parameters is also considered (concentration of reactants, incident light intensity, temperature or presence of external magnetic field). This contribution demonstrates the importance of a general approach involving a thorough knowledge of the elementary steps of initiation in the understanding of any polymerization conducted in a microheterogeneous medium.