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- Rank the following monomers in order of increasing reactivity toward cationic polymerization (least reactive to most reactive).Rank the following monomers in order of increasing reactivity toward anionic polymerization (least reactive to most reactive).Please show the product and mechanism for the cationic polymerization of 2-butene using BF3/H2O to catalyze polymerization. Do you expect this to be an effective polymerization strategy for this monomer? Why or why not?
- Styrene derivatives such as A can be polymerized by way of cationic rather than radical intermediates. Cationic polymerization is an example of electrophilic addition to an alkene involving carbocations. a.) Draw a short segment of the polymer formed by the polymerization ofA.b.) Why does A react faster than styrene (C6H5CH=CH2) in a cationicpolymerization?What small molecule is generated during the polymerization in the above molecule?List the following group of monomers in order of decreasing ability to undergo cationic polymerization.
- Which reaction—dehydration synthesis or hydrolysis—converts a polymer to its monomers? Which one convertsmonomers to a polymer? Explain your answerDraw a structural formula of the polymer resulting from base-catalyzed polymerization of each compound. Would you expect the polymers to be optically active? (S)-(+)-lactide is the dilactone formed from two molecules of (S)-(+)-lactic acid.When certain cycloalkenes are used in metathesis reactions, ringopening metathesis polymerization (ROMP) occurs to form a highmolecular- weight polymer, as shown with cyclopentene as the starting material. The reaction is driven to completion by relief of strain in the cycloalkene.What products are formed by ring-opening metathesis polymerization of each alkene?
- 1.- How does the molecular weight change vs % conversion in a step polymerization? Explain this behavior and why does it occur? 2.- Name at least 3 requirements for obtaining a high molecular weight polymer by step polymerization. 3.- How can you minimize cyclization reactions in a step polymerization? Explain with equations and narrative Why do you want to minimize cyclization? Is it possible to eliminate cyclic products completely?(a) Which monomer is most likely to undergo anionic polymerization? Justify your choice. ( b)Which one ismost likely to undergo cationic polymerization? Justify your choice.Which monomer and which type of initiator can you use to synthesize each of the following polymers?
