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Chapter 30: Question 30.32 (page 1225)

Draw the structure of the polymer that results from anionic polymerization of p-trichloromethylstyrene using ethylene oxide as the electrophile to terminate the chain.

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01

Polymers

Polymer is a chemical compound that contains many identical molecular repeating units. The polymer can be linear, branched, and three-dimensional long-chain molecules.

02

Reagents

Ethylene oxide is used as the “electrophile” to terminate the chain.

03

Structure

Polystyrene is the polymer that results from the anionic polymerization of p-trichloromethylstyrene using ethylene oxide as the electrophile to terminate the chain.

Structure of polystyrene

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Most popular questions from this chapter

Although styrene undergoes both cationic and anionic polymerization equally well, one method is often preferred with substituted styrenes. Which method is preferred with each compound? Explain.

a.

b.

c.

d.

What monomer(s) are used to prepare each polymer or copolymer?

a.

b.

What polymers are formed from each monomer?

a.

b.

Draw the structure of the polymer formed by chain-growth polymerization of each monomer.

a.

b.

Although chain branching in radical polymerizations can occur by intermolecular H abstraction as shown in Mechanism 30.2, chain branching can also occur by intramolecular H abstraction to form branched polyethylene that contains butyl groups as branches.


a. Draw a stepwise mechanism that illustrates which H must be intramolecularly abstracted to form butyl substituents.

b. Suggest a reason why the abstraction of this H is more facile than the abstraction of other H’s.
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