Deck 27: Synthetic Polymers

Question 1

Which of the following is the monomer that gives the polymer shown below?

A)

B)

C)

D)

Answer 1

Question 2

Which one of the following monomers undergoes cationic polymerization most readily?

A) $\mathrm{H}_{2} \mathrm{C}=\mathrm{CH}_{2}$
B) $\mathrm{H}_{2} \mathrm{C}=\mathrm{CHCH}_{3}$
C) $\mathrm{H}_{2} \mathrm{C}=\mathrm{C}\left(\mathrm{CH}_{3}\right)_{2}$
D) $\mathrm{H}_{2} \mathrm{C}=\mathrm{CHCN}$

Answer 2

$\mathrm{H}_{2} \mathrm{C}=\mathrm{C}\left(\mathrm{CH}_{3}\right)_{2}$

Question 3

Which one of the following monomers undergoes anionic polymerization most readily?

A) $\mathrm{H}_{2} \mathrm{C}=\mathrm{CH}_{2}$
B) $\mathrm{H}_{2} \mathrm{C}=\mathrm{CHCH}_{3}$
C) $\mathrm{H}_{2} \mathrm{C}=\mathrm{C}\left(\mathrm{CH}_{3}\right)_{2}$
D) $\mathrm{H}_{2} \mathrm{C}=\mathrm{CHCN}$

Answer 3

$\mathrm{H}_{2} \mathrm{C}=\mathrm{CHCN}$

Question 4

The monomer used to make superglue is shown below. Which one of the following methods of polymerization is most suitable for this type of monomer?

A) free-radical chain-growth
B) cationic chain-growth
C) anionic chain-growth
D) acid-catalyzed step-growth

Question 5

Which one of the following is the monomer that gives the polymer shown below?

A)

B)

C)

D)

Question 6

Identify the repeating unit in the polymer formed from the following reaction sequence.

A)

B)

C)

D)

Question 7

The acid-catalyzed dimerization of isobutylene gives a mixture of two isomeric alkenes (A and $\mathrm{B}$ ). Hydrogenation of this mixture gives a single $\mathrm{C}_{8} \mathrm{H}_{18}$ hydrocarbon. What is the hydrocarbon?

A) 2,2,4-trimethylpentane
B) 2,3,4-trimethylpentane
C) 2,4-dimethylhexane
D) 2,5-dimethyhexane

Question 8

The repeating unit of poly (methyl methacrylate) is shown below. Which one of the following is the monomer used to make poly (methyl methacrylate)?

A)

B)

C)

D)

Question 9

Which one of the following monomers is used to make the polymer carbowax, shown below?

A)

B)

C)

D)

Question 10

Which one of the following initiators can be used for anionic chain-growth polymerization?

A) benzoyl peroxide
B) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{Li}$
C) $\mathrm{BF}_{3}$
D) $\mathrm{Al}\left(\mathrm{CH}_{2} \mathrm{CH}_{3}\right)_{3}, \mathrm{TiCl}_{4}$

Question 11

Which one of the following initiators can be used for free radical chain-growth polymerization?

A) benzoyl peroxide
B) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{Li}$
C) $\mathrm{BF}_{3}$
D) $\mathrm{Al}\left(\mathrm{CH}_{2} \mathrm{CH}_{3}\right)_{3}, \mathrm{TiCl}_{4}$

Question 12

Which one of the following initiators is used to make isotactic polypropylene?

A) benzoyl peroxide
B) $\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{Li}$
C) $\mathrm{BF}_{3}$
D) $\mathrm{Al}\left(\mathrm{CH}_{2} \mathrm{CH}_{3}\right)_{3}, \mathrm{TiCl}_{4}$