42.
Provide the structure of the polymer that is produced when phosgene is treated with 3,3-
dimethyl-1,5-pentanediol.
43.
Provide the structure of the polymer that is produced when the following monomers are
treated in the presence of dilute NaOH.
ClCO(CH2)6OCCl
OO
H2N(CH2)4NH2
+
44.
Which of the following are examples of chain growth polymerization?
A)
radical polymerization
B)
cationic polymerization
C)
anionic polymerization
D)
condensation polymerization
E)
A, B & C
Ans:
E
45.
Which of the following are examples of step growth polymerization?
A)
radical polymerization
B)
cationic polymerization
C)
anionic polymerization
D)
condensation polymerization
E)
none of these
46.
Which of the following polymerization processes best describes formation of
polycarbonates?
A)
step growth addition
B)
chain growth addition
C)
step growth condensation
D)
chain growth condensation
E)
none of these
Ans:
C
47.
Which of the following polymerization processes best describes formation of
polyurethanes?
A)
step growth addition
B)
chain growth addition
C)
step growth condensation
D)
chain growth condensation
E)
none of these
Ans:
A
Ans:
D
48.
Which of the following polymerization processes best describes formation of
polyisobutylene?
A)
step growth addition
B)
chain growth addition
C)
step growth condensation
D)
chain growth condensation
E)
none of these
49.
What is the classification of the following polymer?
A)
polyester
B)
polyamide
C)
polyurethane
D)
polycarbonate
E)
none of these
Ans:
C
50.
Provide the monomer(s) that would produce the following polymer?
HN NH
O
O
O
O
O
N
H
NH
O
O
O
O
N
H
NH
O
Ans:
B
51.
Provide the structure of the polymer that is produced when the following isocyanate is
treated with 1,4-butanediol.
N(CH2)4NCO C O +1,4–butanediol
52.
Which of the following statements is (are) true about linear polymers?
A)
they are highly branched
B)
they may be slightly branched
C)
they have no branching
D)
A & B
E)
B & C
Ans:
E
53.
Which of the following best describes the polymer shown below?
A)
atactic
B)
isotactic
C)
syndiotactic
D)
antidiotactic
E)
none of these
Ans:
B
54.
Which of the following best describes the polymer shown below?
A)
atactic
B)
isotactic
C)
syndiotactic
D)
antidiotactic
E)
none of these
55.
Which of the following best describes the polymer shown below?
A)
atactic
B)
isotactic
C)
syndiotactic
D)
antidiotactic
E)
none of these
Ans:
A
56.
Draw a possible segment of atactic polyacrylonitrile.
Ans:
C
57.
Draw a possible segment of isotactic polyacrylonitrile.
58.
Draw a possible segment of syndiotactic polyacrylonitrile.
59.
Draw a possible segment of syndiotactic poly(vinyl fluoride).
60.
Draw a possible segment of isotactic poly(vinyl acetate).
61.
Polymerization of ethylene in the presence of a Ziegler-Natta catalyst results in
_______.
A)
LDPE
B)
MDPE
C)
HDPE
D)
B & C
E)
none of these
Ans:
C
62.
Free radical polymerization of ethylene results in _______.
A)
LDPE
B)
MDPE
C)
HDPE
D)
B & C
E)
none of these
Ans:
A
63.
Which of the following types of polyethylene is used to make trash bags?
A)
HDPE
B)
LDPE
C)
MDPE
D)
A & C
E)
none of these
Ans:
B
64.
Which of the following types of polyethylene is used to make tupperware?
A)
HDPE
B)
LDPE
C)
MDPE
D)
A & C
E)
none of these
65.
Vulcanization of rubber results in _______ between the neighboring chains of the
polymer.
A)
hydrogen bonding
B)
salt bridges
C)
phosphide bridges
D)
disulfide bridges
E)
none of these
Ans:
D
66.
Neoprene used in gaskets, electrical insulation etc; has the following structure. Provide
the structure of the monomer.
Cl Cl Cl
Ans:
A
67.
SBR (styrene-butadiene rubber) is used in the manufacturing of automobile tires.
Provide the structure of this polymer.
68.
Which of the following best describes crystallites?
A)
crossed linked chains with disulfide bridges
B)
linearly arranged chains held together by van der Waals forces
C)
crossed linked chains held together by van der Waals forces
D)
linearly arranged chains with disulfide bridges
E)
none of these
Ans:
B
69.
________ regions in polymers make the polymer hard and durable.
A)
amorphous
B)
cross linked
C)
crystalline
D)
A & B
E)
B & C
Ans:
E
70.
________ regions in polymers make the polymer flexible.
A)
amorphous
B)
cross linked
C)
crystalline
D)
B & C
E)
none of these
71.
The glass transition temperature (Tg), is the temperature at which the ________regions
of the polymers become ________.
A)
crystalline, amorphous
B)
amorphous, hard
C)
crystalline, hard
D)
amorphous, soft
E)
none of these
Ans:
D
72.
The melt transition temperature (Tm), is the temperature at which the ________ regions
of the polymers become ________.
A)
crystalline, amorphous
B)
amorphous, hard
C)
crystalline, hard
D)
non-crystalline, soft
E)
none of these
Ans:
A
Ans:
A
73.
Which of the following polymers are hard at room temperature and soft at high
temperature?
A)
fibers
B)
elastomers
C)
plasticizers
D)
thermoplastics
E)
thermosetting resins
74.
Which of the following polymers are classified as thermoplastics?
A)
PVC
B)
PET
C)
LDPE
D)
HDPE
E)
all of these
Ans:
E
75.
Addition of _____ to thermoplastics increases flexibility of the polymer.
A)
PVC
B)
plasticizers
C)
resins
D)
LDPE
E)
elastomers
Ans:
B
Ans:
D
76.
Which one of the following is the best classification of an amorphous polymer that is
flexible?
A)
fibers
B)
elastomers
C)
plasticizers
D)
thermoplastics
E)
thermosetting resins
77.
Which of the following polymers are classified as elastomers?
A)
spandex
B)
natural rubber
C)
HDPE
D)
A & B
E)
all of these
Ans:
D
78.
Which of the following best describe elastomers?
A)
polymers that are hard at room temperature
B)
polymers that return to original shape after being stretched
C)
small molecules that are added to polymers to increase flexibility
D)
polymers that can form fibers
E)
none of these
Ans:
B
Ans:
B
79.
Which one of the following is the best classification of crystalline polymers with high
tensile strength?
A)
fibers
B)
elastomers
C)
plasticizers
D)
thermoplastics
E)
thermosetting resins
80.
Which one of the following is the best classification of the polymer Bakelite?
A)
fibers
B)
elastomers
C)
plasticizers
D)
thermoplastics
E)
thermosetting resins
Ans:
E
81.
The strength of the thermosetting polymers like Bakelite is due to ____________.
A)
cross linking
B)
elastomers
C)
plasticizers
D)
thermoplastics
E)
thermosetting resins
Ans:
A
Ans:
A
82.
Which of the following monomer(s) are used to prepare the polymer Bakelite?
A)
phenol & acetaldyde
B)
phenol & formaldyde
C)
phenol & methanol
D)
thermoplastics
E)
none of these
83.
Which of the following functional groups are common in biodegradable polymers?
A)
esters
B)
amides
C)
anhydrides
D)
A & B
E)
A & C
Ans:
D
84.
Which of the following processes is used in the recycling of soft drink bottles made of
PET?
A)
esterification
B)
acid hydrolysis
C)
melting
D)
B & C
E)
none of these
Ans:
B
Ans:
B
85.
Which of the following best describe biodegradable polymers?
A)
polymers that can be broken down by enzymes produced by microorganisms
B)
polymers with ester moieties
C)
polymers with amide moieties
D)
polymers known as polyhydroxyalkanoates
E)
all of these
Ans:
E