Abstract
In this review, we report some recent advances and new horizons in UV-induced cationic photopolymerization. In particular, after a brief introduction on the discovery and affirmation of the cationic photopolymerization process, new efforts in the synthesis of cationic photoinitiators are reported. Subsequently, an interesting and absolutely new application is reported, related to the combination of Radical-Induced Cationic Photopolymerization with Frontal Polymerization, achieving the cross-linking of epoxy composites.
Highlights
Light-induced polymerization reactions are being met with continuous growing interest in different fields, from protective coatings [1], to graphic arts [2], microelectronics [3], dental applications [4], security inks [5], and, 3D-printing technologies [6,7].This polymerization technique shows a number of economic advantages over the usual thermal operation, such as rapid curing, low energy requirements, room-temperature treatment, nonpolluting and solvent-free formulations, and low cost [8]
Cationic photopolymerization has been deeply reviewed in the past [8,13,14,22] but the aim Cationic photopolymerization has been deeply reviewed in the past [8,13,14,22] but the aim of of this paper is to review some very recent advancements in the field of cationic UV curing this paper is to review some very recent advancements in the field of cationic UV curing process—in process—in particular, those related to the synthesis of new photoinitiators and the activation of particular, those related to the synthesis of new photoinitiators and the activation of frontal frontal polymerization for the curing of thick systems
Little been devoted to the synthesis new photoinitiating the limitations related to the attention activation has wavelength of the photoinitators wereofdeeply investigated by systems
Summary
Light-induced polymerization reactions are being met with continuous growing interest in different fields, from protective coatings [1], to graphic arts [2], microelectronics [3], dental applications [4], security inks [5], and, 3D-printing technologies [6,7]. The nature of the anion determines the character of the propagating ion pair This has a direct impact on the kinetics of polymerization and the rate of termination [15].
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