Methyl methacrylate polymerization photoinitiated by pyrene in the presence of triethylamine

p-Nitroacetanilide in the presence of triethylamine as a photoinitiator system for vinyl polymerization

“…15,19 But, it contrasts with that we the NAN triplet with the amine, the initiation rate will be proportional to the fraction of triplet previously reported for the systems fluorenone-TEA 13 and benzil-TEA. 20 In these systems the excited states that are deactivated by the amine and hence to the polymerization rate according to polymerization only takes place in nonpolar media. The lack of polymerization and photobleacheq.…”

“…This mechanism has been proposed for the polymerization of vinyl monomer photoinitiated by pyrene in the presence of aliphatic amines. 15,19 This work was supported by the FONDECYT (Grant 1941068), DICYT (Universidad de Santiago de Chile), and ECOS-CONICYT.…”

“…study deals with the polymerization kinetics, and Polymerization rates (R P ) were measured dilatometrically in oxygen-free solutions, as previously described. 9 Irradiations were carried out or 366 nm line. The bleaching was evaluated from the change in the near-UV absorption band using a Shimadzu-160 spectrophotometer.…”

Methylmethacrylate polymerization photoinitiated by 1‐(bromoacetyl)pyrene

“…1,2 Colorants make up a large class of molecules extensively used to sensitize or start the polymerization of monomers. [3][4][5][6][7][8] The panchromatic sensitization of polymerization requires the presence of a suitable dye as a light absorber.…”

“…6 Pyrene, an aromatic hydrocarbon dye, has been reported as a photoinitiator in the presence of triethylamine. 1,13 Present study was undertaken with a view to see a change in the photo-initiating ability of pyrene, to polymerize methylmethacrylate (MMA), by introduction of OCOCH 3 group in the ring at first step and then replacing ␣-H by OBr. The initiation time and the extent of percent conversion of MMA by pyrene (P), 1-acetylpyrene (AP), and 1-(bromoacetyl)pyrene (BP) have been reported.…”