In this example question, it asks you to predict the most plausible chain growth polymerization mechanism for each of the following monomers. Now, in the first one, we're dealing with acrylamide. You should realize that the alkene carbons here are connected to a carbonyl group, which is an electron-withdrawing group. So, they're taking electron density away. Remember, when we have a meta director attached to this alkene portion, which can act as the bridging portion where it can use its pi bonds to connect different monomers together, remember, that is indicative of an anionic polymerization reaction.

For the next one, we have Cl with its lone pairs, which can act as an electron-donating group. Remember, our meta directors or ortho pair directors from our benzene reactions, halogens, although they can be electron-withdrawing by the inductive effect, they can be electron donating by the resonance effect, which has a greater impact. So, because of it acting as an electron donor, it would work best under a cationic polymerization. And then finally, here we have a methyl group, and then we have OCH₃ with its oxygen lone pairs. This is a strong electron-donating group.

Although we have an alkyl group which can be stabilizing in terms of hyperconjugation, we say that we have this strong OCH₃ electron-donating group. So this would be best for cationic polymerization. Alright? So, these would be the different types of chain growth polymerizations that are possible with each of the following monomers.