Abstract
The photoinitiated polymerisation of different types of vinyl ether-based resins has been studied by real-time infrared spectroscopy. The cationic initiated chain reaction was shown to proceed extensively within seconds, on UV exposure of divinyl ether monomers in the presence of on arylsulfonium salt. Various factors affect the polymerisation kinetics, such as the type of photoinitiator, the light intensity and the viscosity of the mixture. Different kinds of tridimensional polymer networks have been produced by the UV-curing of hybrid systems made from a vinyl ether (VE) and a co-monomer. With triaaylate monomers associated with divinyl ethers, interpenetrating polymer networks or cross-linked copolymers with isolated VE units were generated, depending on the type of photoinitiator used. In the presence of electron acceptor monomers, such as maleates or maleimides, vinyl ether monomers undergo a ready copolymerisation on UV irradiation, by a radical-type mechanism, with the formation of an alternating copolymer.
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