Kinetic study of free radical bulk copolymerization of styrene-methyl methacrylate

Free-radical copolymerization. 3. Determination of rate constants of propagation and termination for styrene/methyl methacrylate system. A critical test of terminal-model kinetics

“…The present system has been believed to have large, composition-dependent values of . In agreement to previous results,8, [15][16][17][18][19] the open circles in Figure 13 correspond to values of ranging from about 9 to about 30 (in order of increasing fi). It is now clear that the large is a direct consequence of applying the erroneous model for the propagation step.…”

1-(Bromoacetyl)pyrene, a novel photoinitiator for the copolymerization of styrene and methylmethacrylate

“…Free radical copolymerization of styrene and methyacrylic acid esters have been studied extensively and described in many publications (Daniel and Srivastava, 2001;Bajpai and Srivastava, 2001;Khan and Wadehra, 1981;Fukuda et al, 1991;Srivastava and Mathur, 1981). Initiators, such as 3-methoxy carbonyl-3-methyl-2,2,5,5-tetraphenylhexanedinitrile (Dietrich et al, 1989) (Grishin et al, 1992), 4-[diphenyl(trimethyl silyl)methyl] benzophenone (Tasis et al, 1998), peroxypivalate (Nakamura et al, 1998), several ylides (Daniel and Srivastava, 2001;Bajpai and Srivastava, 2001), zinc chloride (Srivastava and Mathur, 1981;Srivastava and Mathur, 1982) are among a few reported ones for copolymerization of MMA with Sty.…”