Photopolymerization of 2-(dimethylaminoethyl)methacrylate induced by diacetoxyiodobenzene and bis(trifluoroacetoxy) iodobenzene

Photomediated Controlled Radical Polymerization and Block Copolymerization of Vinylidene Fluoride

“…However, while the related diaryliodonium hypervalent iodide salts are known cationic polymerization photoinitiators , and photoacid generators in photolithography, , even though an early attempt of their use in thermal polymerization was disclosed over 60 years ago, the thermolysis or photolysis of HVICs including IDAB and IFAB to produce radical initiators, or the photolysis and use of the Dess–Martin reagent in radical reactions, remains largely overlooked. − Moreover, the use of such HVICs as convenient and clean CX 3 • or CX 3 I precursors (X = H and F) for methylation (IDAB and DMPI), trifluoromethylation (IFAB), or iodotrifluoromethylation (IFAB/I 2 ) and as radical initiators for both conventional or fluorinated monomers has not been recognized until very recently …”

“…1 H- and 19 F-NMR confirm the decarboxylation and selective, regiospecific, CX 3 • initiation, i.e., predominant formation of CX 3 –CH 2 –CF 2 –PVDF not CX 3 –CF 2 –CH 2 –PVDF, and the absence of CX 3 COO–PVDF (eq 2′). Moreover, as indicated by the absence of any PVDF–I chain ends, no IDT derived from the potential trapping , of the growing chain with the photolytically unstable , iodanyl (9-I-2) − radicals (e.g., R–I • –Ph or RI • (−Ph–COO−), R = CX 3 –, CX 3 COO–, and PVDF−) or by chain transfer with the in situ generated PhI is occurring. Thus, decarboxylation is faster than addition to VDF, and the cogenerated Ph–I or HOOC–Ph–I are not effective iodine CT agents at 40 °C.…”

Studies of concentration dependences of phase transition temperatures of amine-containing (meth)acrylic copolymers in aqueous solutions

“…Viscosity average molecular weight of polymers (M η ) was calcu lated from the equation [12] [η] = 6.14 × 10 -5…”