Chain branching is not as common with anionic polymerization as it is with free-radical polymerization and cationic polymerization. Propose a mechanism for chain branching in the polymerization of acrylonitrile.

Chain branching is not as common with anionic polymerization as it is with free-radical polymerization and cationic polymerization. Propose a mechanism for chain branching in the polymerization of acrylonitrile.

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 29.11P

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Concept explainers

Types of Polymers on the basis of Method of Preparation

Question

Definition Definition Chemical process in which one or more monomers combine to produce a very large chain-like molecule called a polymer. The functional groups present on the monomers and their steric effects are responsible for polymerization through a sequence of reactions that vary in complexity. There exists a stable covalent chemical bond between monomers that sets apart polymerization from other processes.

Expert Solution

Step 1

In the first or the initiation step of mechanism for chain branching in the polymerization of acrylonitrile, an initiator that is Butyllithium is added to a vinyl group that is attached to nitrile group monomer, to form an anion as shown below.

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Types of Polymers on the Basis of Method of Preparation

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