Use of Diaryliodonium/Phosphine Radical-Chain Chemistry for Visible Photoinitiation of Cationic Polymerizations. Trimethyl Phosphite as a Co-initiator of the Ring-Opening Polymerization of Cyclohexene Oxide

Solvent‐free ring‐opening polymerization of cyclohexene oxide catalyzed by palladium chloride

“…The 13 C‐NMR spectrum shows methylene carbons at 22.3 to 24.3, 28.7 to 30.9 ppm and methine carbons at 75.5 to 80.3, 76.05 to 77.3 ppm. These results are consistent with the literature . .…”

“…The thermal latent catalysis polymerization of CHO is widely used in industry, but it often has a poor polymerization yield, and the catalysts usually require tedious multistep process to synthesize. Considerable efforts have been devoted to finding new catalysts with improved CHO polymerization yield . Onium compounds (eg, iodonium, pyridinium, and sulfonium salts) and metal complexes have been reported to show catalytic activity when aided by light and/or a cocatalyst.…”

“…Considerable efforts have been devoted to finding new catalysts with improved CHO polymerization yield. [9][10][11][12][13][14][15][16][17][18][19] Onium compounds [9][10][11][12][13][14][15] (eg, iodonium, pyridinium, and sulfonium salts) and metal complexes 16,17 have been reported to show catalytic activity when aided by light and/or a cocatalyst.…”

UV‐ignited frontal polymerization of an epoxy resin

“…This results in the very rapid and efficient generation of a large number of initiating cationic species by a nonphotochemical process,12, 13 thus consuming the monomer in the deeper layers. This mechanism has been widely reported and discussed in the literature 14–19…”

Polymerization of epoxides catalyzed by a mixed-valent iron trifluoroacetate [Fe3O(O2CCF3)6(H2O)3]

“…On the other hand, a number of methods for cationic epoxide polymerization were reported in the literature in which photolytically or thermally in situ generated non‐nucleophilic Brønsted acids (e.g. HPF 6 , HSbF 6 ),16–22 photolytically or thermally in situ generated carbenium ions23–25 as well as Lewis acids26–29 were all used as initiators or catalysts. However, there are drawbacks that need to be improved in the existing methods for epoxide polymerization, which include low efficiency, the use of expensive or specific catalysts or initiators and the use of sophisticated laboratory equipment.…”