Benzoyl peroxide steric effect

Benzoyl peroxide is much larger than H202, but the steric effect is apparently not a factor for the highest rate constant k. Assuming that the activation of hydroperoxides by Fem-TAMLs... [Pg.507]

While steric hindrance may play a role in decreasing rates and molecular weights in dimethyl itaconate polymerization, the limited effect of initiator concentration on molecular weights as measured by the intrinsic viscosity suggests other factors must be present. Pol5unethyl methacrylate formed at 60° with benzoyl peroxide initiator shows an inverse proportionality of degree of polymerization with polymerization rate as ifrould be expected kinetically for bimolecular termination. [Pg.218]