Themed collection Photopolymer science

Kurt Dietliker, Robert Liska and Marco Sangermano introduce the Polymer Chemistry themed collection on photopolymer science dedicated to Ewa Andrezejewska.

Squaraines are an important and very interesting group of organic functional dyes because of their unique physicochemical properties. These compounds have found many applications in different areas of science and technique.

A photobase generator absorbing upconversion fluorescence can efficiently catalyze anionic thiol-epoxy click photopolymerization under 980 nm NIR light irradiation.

Digital light 3D printing of biodegradable elastomers with mechanical properties comparable to the ones of Sylgard-184 via dual-polymer resins.

Shape memory polymers (SMPs) capable of recovering from a deformed state through heating were 3D printed using volumetric additive manufacturing, which enabled the layerless, single-step fabrication of self-standing tripod and actuating gripper structures.

A novel cyclopolymerizable allyl–acrylate quaternary ammonium salt PI based on I2959 and its cyclocopolymer with DADMAC are synthesized and their water solubility, photoinitiation ability, migration stability and thermal stability is evaluated.

Modification of photocurable radical systems with high molecular weight prepolymers enables access to a wide array of polymer structures and properties.

In this work, we report the synthesis of polymerizable ionic liquids (PILs) and the synthesis of ionogels by thiol–ene photopolymerization.

3-Ketoquinolones are efficient Type II photoinitiators for free radical photopolymerization.

Photolatent base catalysts exhibiting ideal structural properties for the straightforward manufacturing of thiol–epoxy vitrimers equipped with spatially resolved dynamic properties.

A photolinker for formation of disulfide-crosslinked hydrogels via light-triggered thiol–ene conjugation has been developed. Hydrogels can be patterned via two-photon cleavage of disulfide-linkages in the presence of a two-photon active compound.

Additive manufacturing of phenolic resins as a proof-of-concept for the first photo-chemical induced polycondensation by Hot Lithography. Through the dual use of a photoacidgenerator, the first pure 3D printing of Bakelite^© is investigated.

An azobenzene-containing block copolymer self-assembled into island-like nanostructures. The island-like nanostructures fused into chain-like nanostructures under UV irradiation based on photoinduced solid-to-liquid transitions at the nanoscale.

The present article describes the efficiency of novel two-component photoinitiators based on a typical squaraine dye and its difluoroborate analogues for the radical polymerization of acrylate monomers.

Antibacterial highly grafted cotton fabric with good laundry resistance was prepared using photoATRP in the presence of air.

We report the design of easily accessible, meso-methyl BODIPY monomers and their incorporation into photoclippable macromolecules.

Herein, new iodonium salts based on a 4,4-difluoro-1,3,5,7,8-pentamethyl-4-bora-3a,4a-diaza-s-indecene (B-1) chromophore have been introduced to 3D printing applications.

We highlight the role of thiyl initiating radicals generated by air oxidation of thiols in the mechanism accounting for the self-initiation of thiol–ene polymerization. The driving force of this reaction is polarization of the S–H bond.

We report a high throughput approach for the screening of RAFT agents and photocatalysts to mediate photoinduced electron/energy transfer-reversible addition–fragmentation chain transfer (PET-RAFT) polymerization.

Photo-induced cationic ring opening reactions were performed on main chain polybenzoxazine precursors using iodonium salts.

NIR-sensitized photopolymerisation at 805 nm facilitates the cationic polymerization of oxetanes. This can additionally be combined with free-radical polymerization.

By following shape-memory assisted self-healing (SMASH), we used the shape-memory properties of thiol-acrylate photopolymers to physically close a scratch, whilst chemical healing was obtained via thermo-activated dynamic exchange reactions.

A new photochemical approach for the synthesis of metal-free three-dimensional hollow spherical conjugated polymers is described.