Push–pull coumarin-based one-component iodonium photoinitiators for cationic nanocomposite 3D-VAT printing

Abstract

In this article, we described a new group of cationic photoinitiators.

Photopolymerization activated by photobase generators and applications: from photolithography to high-quality photoresists

“…24–28 For instance, coumarin scaffold iodonium salts were utilized as efficient PAGs to construct interpenetrating polymer network (IPN) polymeric materials following cationic/free radical mechanisms; 29 Also, new coumarin based iodonium salts reported recently were performed in cationic polymerization, even induce the low reactive monomers like oxetanes and glycidyl ethers. 30 Moreover, the progress was also made in environmental and industrial aspects: PAGs were utilized to produce degradable polyester by inducing the ROP of cyclic esters under 365 nm LED light irradiation; 31 On the other hand, PAGs also participate in the preparation of high-performance photoresists during the fabrication of MEMS devices. 32–34 However, photoacid generators also have specific defects, such as sensitivity to light and temperature, which can impact the stability and repeatability of the photopolymerization process.…”

Naphthalene–stilbenes as effective visible-light sensitizers to study the effect of diluent and nanofillers on in situ photopolymerization and 3D-VAT printing process

“…38–41 In 3D-VAT printing, the type, amount, and form of the initiator/initiating system are particularly important for further applications. 42–46 The initiating system should provide a quick start to the process, ensuring reasonable printing time, should be sensitive to the light source, not causing overcrosslinking, and allow the highest possible precision and resolution of the printed objects. Both in situ polymerization and additive technologies imply specific requirements on monomers.…”