Methyl acrylate undergoes anionic polymerization using a variety of anionic initiators. Consider the reaction of methyl acrylate with a trace amount of tert-butyllithium. polymer Draw the curved arrow mechanism to show the initiation step, in which the tert-butanide anion acts as the initiator. Draw the curved arrow mechanism for the initiation step in the anionic polymerization of methyl acrylate. H C N 0 S F Cl

Methyl acrylate undergoes anionic polymerization using a variety of anionic initiators. Consider the reaction of methyl acrylate with a trace amount of tert-butyllithium. polymer Draw the curved arrow mechanism to show the initiation step, in which the tert-butanide anion acts as the initiator. Draw the curved arrow mechanism for the initiation step in the anionic polymerization of methyl acrylate. H C N 0 S F Cl

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter29: Organic Polymer Chemistry

Section: Chapter Questions

Problem 29.34P: Radical polymerization of styrene gives a linear polymer. Radical polymerization of a mixture of...

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Predict the order of reactivity (and justify your prediction) of the given monomers. Styrene, 2-vinylpyridine, 3-vinylpyridine, and 4-vinyl pyridine in anionic polymerization. Styrene, p-methoxystyrene, p-chlorostyrene, and p-methylstyrene in cationic polymerization.
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Plywood and particle board are often glued with cheap, waterproof urea-formaldehyde resins. Two to three moles of formaldehyde are mixed with one mole of urea and a little ammonia as a basic catalyst. The reaction is allowed to proceed until the mixture becomes syrupy, and then it is applied to the wood surface. The wood surfaces are held together under heat and pressure, while polymerization continues and cross-linking takes place. Propose a mechanism for the base-catalyzed condensation of urea with formaldehyde to give a linear polymer, and then show how further condensation leads to cross-linking.
Question 4. Methylvinyl ketone (MVK) can undergo a polymerization reaction in the presence of AIBN initiator to produce a poly(methylvinyl ketone) polymer according to the scheme below. NEC H3C CH3 `N=N₂ CH3 CEN CH3 azobisisobutyronitrile (AIBN) CH3 methylvinyl ketone (MVK) heat CH3 H3C NEC n poly(methylvinyl ketone) a) Provide the mechanism for heat-induced decomposition of the AIBN initiator to produce a reactive radical species. CH3 NEC H3C `N = N heat CH3 CEN CH3 10 0-0 b) Provide a mechanism for the initiation step in the MVK polymerization reaction: c) Show the mechanism for the propagation step to form an MVK oligomer with n = 3: branched sidare tass xy ha et
Chain branching is not as common with anionic polymerization as it is with free-radical polymerization and cationic polymerization. Compare the relative stabilities of the intermediates in this mechanism with those you drew for chain branching in the cationic polymerization of styrene. Explain why chain branching is less common in this anionic polymerization.