Deck 31: Synthetic Polymers

Question 1

____ a polyurethane

A)BF₃ + H₂O
B)elastomer
C)chain-growth polymer
D)AL(CH₂CH₃)₃ + TiCl₄
E)
F)
G)thermoplastic
H)homopolymer
I)plasticizers
J)thermosetting resins
K)copolymers
L)step-growth polymer
M)Grubb's catalyst
N)metallacycle
O)
P)

Answer 1

Question 2

Rank the following monomers in order of increasing reactivity toward cationic polymerization (least reactive to most reactive).

A)III,IV,I,II
B)II,I,IV,III
C)I,II,IV,III
D)IV,III,I,II

Answer 2

II,I,IV,III

Question 3

_____ General structure: M=CHR

A)BF₃ + H₂O
B)elastomer
C)chain-growth polymer
D)AL(CH₂CH₃)₃ + TiCl₄
E)
F)
G)thermoplastic
H)homopolymer
I)plasticizers
J)thermosetting resins
K)copolymers
L)step-growth polymer
M)Grubb's catalyst
N)metallacycle
O)
P)

Answer 3

Grubb's catalyst

Question 4

Exhibit 31-2
Draw the structure(s) of the monomer(s) used to make each of the following polymers.
Draw:

Question 5

____ Isotactic propylene

A)BF₃ + H₂O
B)elastomer
C)chain-growth polymer
D)AL(CH₂CH₃)₃ + TiCl₄
E)
F)
G)thermoplastic
H)homopolymer
I)plasticizers
J)thermosetting resins
K)copolymers
L)step-growth polymer
M)Grubb's catalyst
N)metallacycle
O)
P)

Question 6

____ a Ziegler-Natta catalyst

A)BF₃ + H₂O
B)elastomer
C)chain-growth polymer
D)AL(CH₂CH₃)₃ + TiCl₄
E)
F)
G)thermoplastic
H)homopolymer
I)plasticizers
J)thermosetting resins
K)copolymers
L)step-growth polymer
M)Grubb's catalyst
N)metallacycle
O)
P)

Question 7

Do you expect nitroethylene to be more or less reactive than ethylene toward cationic polymerization? Explain.

Question 8

____ Small organic molecules that act as lubricants between polymer chains.

A)BF₃ + H₂O
B)elastomer
C)chain-growth polymer
D)AL(CH₂CH₃)₃ + TiCl₄
E)
F)
G)thermoplastic
H)homopolymer
I)plasticizers
J)thermosetting resins
K)copolymers
L)step-growth polymer
M)Grubb's catalyst
N)metallacycle
O)
P)

Question 9

Exhibit 31-2
Draw the structure(s) of the monomer(s) used to make each of the following polymers.
Draw:

Question 10

Monomer A is copolymerized with Monomer B and is found to have the following structure: The type of copolymer formed is:

A)a random copolymer
B)an alternating copolymer
C)a block copolymer
D)a graft copolymer

Question 11

Rank the following monomers in order of increasing reactivity toward anionic polymerization (least reactive to most reactive).

A)III,II,IV,I
B)II,III,I,II
C)I,IV,III,II
D)IV,III,II,I

Question 12

Draw two repeating units of the polymer formed by the reaction of 1,3-butadiene with the following substance.Atoms other than carbon and hydrogen are labeled.

Question 13

______ four-membered metal containing intermediate

A)BF₃ + H₂O
B)elastomer
C)chain-growth polymer
D)AL(CH₂CH₃)₃ + TiCl₄
E)
F)
G)thermoplastic
H)homopolymer
I)plasticizers
J)thermosetting resins
K)copolymers
L)step-growth polymer
M)Grubb's catalyst
N)metallacycle
O)
P)

Question 14

____ Bakelite is this type of polymer.

A)BF₃ + H₂O
B)elastomer
C)chain-growth polymer
D)AL(CH₂CH₃)₃ + TiCl₄
E)
F)
G)thermoplastic
H)homopolymer
I)plasticizers
J)thermosetting resins
K)copolymers
L)step-growth polymer
M)Grubb's catalyst
N)metallacycle
O)
P)

Question 15

____ Amorphous polymers that have the ability to stretch out and spring back to their original shape.

A)BF₃ + H₂O
B)elastomer
C)chain-growth polymer
D)AL(CH₂CH₃)₃ + TiCl₄
E)
F)
G)thermoplastic
H)homopolymer
I)plasticizers
J)thermosetting resins
K)copolymers
L)step-growth polymer
M)Grubb's catalyst
N)metallacycle
O)
P)

Question 16

Exhibit 31-2
Draw the structure(s) of the monomer(s) used to make each of the following polymers.
Draw:

Question 17

____ Produced by reactions in which each bond in the polymer is formed independently of the others.

A)BF₃ + H₂O
B)elastomer
C)chain-growth polymer
D)AL(CH₂CH₃)₃ + TiCl₄
E)
F)
G)thermoplastic
H)homopolymer
I)plasticizers
J)thermosetting resins
K)copolymers
L)step-growth polymer
M)Grubb's catalyst
N)metallacycle
O)
P)

Question 18

____ Polymers obtained when two or more different monomers are allowed to polymerize together.

A)BF₃ + H₂O
B)elastomer
C)chain-growth polymer
D)AL(CH₂CH₃)₃ + TiCl₄
E)
F)
G)thermoplastic
H)homopolymer
I)plasticizers
J)thermosetting resins
K)copolymers
L)step-growth polymer
M)Grubb's catalyst
N)metallacycle
O)
P)

Question 19

Do you expect nitroethylene to be more or less reactive than ethylene toward anionic polymerization? Explain.

Question 20

Exhibit 31-2
Draw the structure(s) of the monomer(s) used to make each of the following polymers.
Draw:

Question 21

Consider the following diagram representing crystallites. Which type of polymer is represented?

A)thermoplastic
B)fiber
C)elastomer
D)thermosetting resins

Question 22

In general,which of the following types of polymers would probably be the least crystalline?

A)isotactic
B)atactic
C)syndiotactic

Question 23

Which of the following is not a property of a crystalline polymer?

A)unaffected by steric properties of substituent groups
B)generally hard and durable
C)crystalline regions become amorphous on heating
D)contain highly organized regions

Question 24

Which type of polymer has a high glass transition temperature (T_g)?

A)thermoplastic
B)fiber
C)elastomer
D)thermosetting resins

Question 25

Within a crystallite,the polymer chains are held together by:

A)disuflide bridges
B)hydrogen bonds
C)van der Walls forces
D)covalent bonds

Question 26

Classify the following polymer.

A)isotactic
B)syndiotactic
C)atactic

Question 27

Draw the structure of the product produced by the acyclic diene metathesis (ADMET) of 1,6-heptadiene.

Question 28

Which of the following is not an advantage of olefinic metathesis polymerization?

A)It can be used in the presence of many functional groups.
B)It results in an unsaturated polymer.
C)The resulting polymer is susceptible to further chemical changes.
D)ROMP reactions run with high efficiency but ADMET reactions do not.
E)All characterize olefinic metathesis polymerization procedures.

Question 29

Draw the structure of the monomer used to produce the following polymer segment using the ROMP method.

Question 30

Which type of polymer is characterized by irregular chain length,low T_g,and only a small degree of cross-linking?

A)thermoplastic
B)fiber
C)elastomer
D)thermosetting resins

Question 31

Classify the following polymer.

A)isotactic
B)syndiotactic
C)atactic

Question 32

Which of the following monomers could produce atactic,isotactic,and syndiotactic polymers?

A)H₂C=CH₂
B)H₂C=CClH
C)H₂C=CCl₂
D)Cl₂C=CCl₂

Question 33

Which of the following represents the general structure of a urethane?

A)
B)
C)
D)