Deck 27: Synthetic Polymers

Question 1

Which of the following is used as an initiator in radical polymerization?

A)BF₃,H₂O
B)CH₃CH₂CH₂CH₂Li
C)ROOR
D)NaOH
E)none of these

Answer 1

ROOR

Question 2

Which one of the following is classified as a homopolymer?

A)saran
B)viton
C)poly(vinyl bromide)
D)SAN
E)none of these

Answer 2

poly(vinyl bromide)

Question 3

Which one of the following monomers will produce polyisoprene?

A)I
B)II
C)III
D)IV
E)none of these

Answer 3

II

Question 4

Polymers with single monomers are called_______,where as those with two or more different monomers are called________.

A)copolymers,homopolymers
B)homopolymers,copolymers
C)block polymers,homopolymers
D)homopolymers,block polymers
E)none of these

Question 5

The following polymer is classified as a(an)________.

A)homopolymer
B)block copolymer
C)graft copolymer
D)alternating copolymer
E)random copolymer

Question 6

Which one of the following is the correct structure for polystyrene?

A)I
B)II
C)III
D)IV
E)none of these

Question 7

PET,used to make soft-drink bottles,is classified as a(n)__________.

A)homopolymer
B)block copolymer
C)graft copolymer
D)alternating copolymer
E)random copolymer

Question 8

Which one of the following monomers will produce polyisobutylene?

A)I
B)II
C)III
D)IV
E)none of these

Question 9

Polyesters are classified as as __________.

A)homopolymers
B)block copolymers
C)graft copolymers
D)alternating copolymers
E)random copolymers

Question 10

Which one of the following is not a biopolymer?

A)amylopectin
B)DNA
C)glycogen
D)chitin
E)none of these

Question 11

Which one of the following is classified as a copolymer?

A)saran
B)polyacrylonitrile
C)poly(vinyl bromide)
D)polystyrene
E)none of these

Question 12

Which one of the following is the correct structure for poly(vinylidine fluoride)?

A)I
B)II
C)III
D)IV
E)none of these

Question 13

The following polymer is classified as a(an)________.

A)homopolymer
B)block copolymer
C)graft copolymer
D)alternating copolymer
E)random copolymer

Question 14

Which one of the following monomers will produce poly(vinyl chloride)?

A)I
B)II
C)III
D)IV
E)none of these

Question 15

The following polymer is classified as a(an)________.

A)homopolymer
B)block copolymer
C)graft copolymer
D)alternating copolymer
E)random copolymer

Question 16

Which of the following monomer pairs are required to make the following polymer?

A)propene & acrylonitrile
B)isoprene & acrylonitrile
C)ethylene & acrylonitrile
D)isobutylene & acrylonitrile
E)none of these

Question 17

Which one of the following is the correct structure for poly(vinyl acetate)?

A)I
B)II
C)III
D)IV
E)none of these

Question 18

Which of the following monomer(s)is(are)required to make the following polymer?

A)propene
B)isobutylene
C)isoprene
D)styrene
E)none of these

Question 19

Provide a structure of an alternating copolymer constructed from propylene and acrylonitrile.

Question 20

Provide a structure of a block copolymer constructed from isobutylene and vinyl fluoride.

Question 21

Which of the following monomers would produce the condensation polymer below?

A)I
B)II
C)III
D)IV
E)C & D

Question 22

Which of the following is (are)condensation polymer(s)?

A)nylon 6,6
B)polyisobutylene
C)poly(vinyl chloride)
D)polycarbonate
E)A & D

Question 23

Which of the following monomers would be most reactive towards cationic polymerization?

A)I
B)II
C)III
D)IV
E)V

Question 24

Provide the structure of the polymer that is produced when the following monomers react.

Question 25

Which of the following monomers would produce the condensation polymer below?

A)I
B)II
C)III
D)IV
E)C & D

Question 26

Arrange the following monomers in decreasing order of reactivity towards cationic polymerization?

A)I>III>II
B)II>I>III
C)III>II>I
D)II>III>I
E)III>I>II

Question 27

Which of the following monomer(s)would undergo cationic polymerization?

A)vinylidine fluoride
B)acrylonitrile
C)isobutylene
D)vinyl acetate
E)all of these

Question 28

Which of the following is used as an initiator in cationic polymerization?

A)BF₃,H₂O
B)CH₃CH₂CH₂CH₂Li
C)ROOR
D)NaOH
E)none of these

Question 29

Provide the structure of monomer(s)that would produce the following condensation polymer.

Question 30

Which of the following is used as an initiator in anionic polymerization?

A)BF₃,H₂O
B)CH₃CH₂CH₂CH₂Li
C)ROOR
D)H₂SO₄
E)none of these

Question 31

Which of the following polymers would be best prepared using anionic polymerization?

A)I
B)II
C)III
D)IV
E)none of these

Question 32

Which of the following monomer(s)would undergo both radical and cationic polymerization?

A)methylmethacrylate
B)acrylonitrile
C)isobutylene
D)vinylidine chloride
E)all of these

Question 33

Arrange the following monomers in decreasing order of reactivity towards anionic polymerization?

A)I>III>II
B)II>III>I
C)III>II>I
D)II>I>III
E)III>I>II

Question 34

Arrange the following monomers in decreasing order of reactivity towards anionic polymerization?

A)I>III>II
B)II>I>III
C)III>II>I
D)II>III>I
E)III>I>II

Question 35

_________polymerization usually forms living polymers if the process is not terminated by an electrophile.

A)anionic
B)cationic
C)radical
D)A & B
E)B & C

Question 36

Which of the following monomers would be most reactive towards anionic polymerization?

A)I
B)II
C)III
D)IV
E)V

Question 37

Nomex is a synthetic polymer with the following structure.Provide the structure(s)of monomer(s)that would produce Nomex.

Question 38

Which of the following polymers would be best prepared using cationic polymerization?

A)I
B)II
C)III
D)IV
E)none of these

Question 39

Which of the following monomer(s)would undergo anionic polymerization?

A)vinyl acetate
B)acrylonitrile
C)isobutylene
D)vinylidine chloride
E)all of these

Question 40

Provide the structure of monomer(s)that would produce the following condensation polymer?

Question 41

Provide the structure of the polymer that is produced when the following monomers are treated in the presence of dilute NaOH.

Question 42

Provide the structure of monomer(s)that would produce the following condensation polymer?

Question 43

Which of the following best describes the polymer shown below?

A)atactic
B)isotactic
C)syndiotactic
D)antidiotactic
E)none of these

Question 44

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

Question 45

Provide the structure of the polymer that is produced when the following isocyanate is treated with 1,4-butanediol.

Question 46

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

Question 47

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

Question 48

Which of the following best describes the polymer shown below?

A)atactic
B)isotactic
C)syndiotactic
D)antidiotactic
E)none of these

Question 49

Provide the monomer(s)that would produce the following polymer?

Question 50

Which of the following best describes the polymer shown below?

A)atactic
B)isotactic
C)syndiotactic
D)antidiotactic
E)none of these

Question 51

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

Question 52

Draw a possible segment of syndiotactic poly(vinyl fluoride).

Question 53

What is the classification of the following polymer?

A)polyester
B)polyamide
C)polyurethane
D)polycarbonate
E)none of these

Question 54

Draw a possible segment of isotactic polyacrylonitrile.

Question 55

Draw a possible segment of syndiotactic polyacrylonitrile.

Question 56

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

Question 57

Provide the structure of the polymer that is produced when phosgene is treated with 3,3-dimethyl-1,5-pentanediol.

Question 58

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

Question 59

Draw a possible segment of isotactic poly(vinyl acetate).

Question 60

Draw a possible segment of atactic polyacrylonitrile.

Question 61

Neoprene used in gaskets,electrical insulation etc;has the following structure.Provide the structure of the monomer.

Question 62

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

Question 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

Question 64

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

Question 65

Addition of _____ to thermoplastics increases flexibility of the polymer.

A)PVC
B)plasticizers
C)resins
D)LDPE
E)elastomers

Question 66

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

Question 67

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

Question 68

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

Question 69

________ regions in polymers make the polymer hard and durable.

A)amorphous
B)cross linked
C)crystalline
D)A & B
E)B & C

Question 70

SBR (styrene-butadiene rubber)is used in the manufacturing of automobile tires.Provide the structure of this polymer.

Question 71

Which of the following polymers are classified as thermoplastics?

A)PVC
B)PET
C)LDPE
D)HDPE
E)all of these

Question 72

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

Question 73

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

Question 74

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

Question 75

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

Question 76

Which of the following polymers are classified as elastomers?

A)spandex
B)natural rubber
C)HDPE
D)A & B
E)all of these

Question 77

Free radical polymerization of ethylene results in _______.

A)LDPE
B)MDPE
C)HDPE
D)B & C
E)none of these

Question 78

________ regions in polymers make the polymer flexible.

A)amorphous
B)cross linked
C)crystalline
D)B & C
E)none of these

Question 79

Which one of the following is the best classification of the polymer Bakelite?

A)fibers
B)elastomers
C)plasticizers
D)thermoplastics
E)thermosetting resins

Question 80

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