Question 1

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

Accepted Answer

The answer of Draw the structure of the monomer used...

Question 2

MATCH a term or structure from the list below to each of the following definitions or names. Place the letter of the term or structure in the blank to the left of the definition or name which it describes.
-____ Produced by reactions in which each bond in the polymer is formed independently of the others.

Accepted Answer

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)  
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)  L

Question 3

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

Accepted Answer

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

Question 4

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

Accepted Answer

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 
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 5

MATCH a term or structure from the list below to each of the following definitions or names. Place the letter of the term or structure in the blank to the left of the definition or name which it describes.
-______ four-membered metal containing intermediate

Accepted Answer

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)  
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

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

Accepted Answer

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

Question 7

Exhibit 31-3
Classify each polymer below as step-growth or chain-growth.20.   ANSWER:
chain-growth
POINTS:
1
21.   ANSWER:
chain-growth
POINTS:
1
22.   ANSWER:
step-growth
POINTS:
1
23.   ANSWER:
step-growth
POINTS:
1
Exhibit 31-4
Draw the structure of the polymers obtained from the following reactions.
24.   ANSWER:   POINTS:
1
25.   ANSWER:   POINTS:
1
26.   ANSWER:   POINTS:
1
27.   ANSWER:   POINTS:
1
28.   ANSWER:   POINTS:
1
-Monomer A is copolymerized with Monomer B and is found to have the following structure: -(-A-B-B-B-A-B-A-B-A-A-B-A-A-)-
The type of copolymer formed is:

Accepted Answer

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

Question 8

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

Accepted Answer

A)  isotactic 
B)  atactic 
C)  syndiotactic 
A)  isotactic 
B)  atactic 
C)  syndiotactic

Question 9

MATCH a term or structure from the list below to each of the following definitions or names. Place the letter of the term or structure in the blank to the left of the definition or name which it describes.
-____ Amorphous polymers that have the ability to stretch out and spring back to their original shape.

Accepted Answer

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)  
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 10

MATCH a term or structure from the list below to each of the following definitions or names. Place the letter of the term or structure in the blank to the left of the definition or name which it describes.
-____ Polymers obtained when two or more different monomers are allowed to polymerize together.

Accepted Answer

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)  
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 11

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

Accepted Answer

The answer of Draw the structure(s) of the monomer(s) used...

Question 12

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

Accepted Answer

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

Question 13

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.

Accepted Answer

The answer of Draw two repeating units of the polymer...

Question 14

MATCH a term or structure from the list below to each of the following definitions or names. Place the letter of the term or structure in the blank to the left of the definition or name which it describes.
-____ a polyurethane

Accepted Answer

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)  
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

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

Accepted Answer

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

Question 16

MATCH a term or structure from the list below to each of the following definitions or names. Place the letter of the term or structure in the blank to the left of the definition or name which it describes.
-____ Small organic molecules that act as lubricants between polymer chains.

Accepted Answer

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)  
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 17

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

Accepted Answer

Cationic polymerization is favored when

Question 18

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

Accepted Answer

A)  can be used in the presence of many functional groups 
B)  results in a unsaturated polymer 
C)  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. 
A)  can be used in the presence of many functional groups 
B)  results in a unsaturated polymer 
C)  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 19

Classify the following polymer.

Accepted Answer

A)  isotactic 
B)  syndiotactic 
C)  atactic 
A)  isotactic 
B)  syndiotactic 
C)  atactic

Question 20

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

Accepted Answer

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

Exam 27: Synthetic Polymerse

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

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

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

MATCH a term or structure from the list below to each of the following definitions or names. Place the letter of the term or structure in the blank to the left of the definition or name which it describes. -______ four-membered metal containing intermediate

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

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

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

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

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.

MATCH a term or structure from the list below to each of the following definitions or names. Place the letter of the term or structure in the blank to the left of the definition or name which it describes. -____ a polyurethane

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

MATCH a term or structure from the list below to each of the following definitions or names. Place the letter of the term or structure in the blank to the left of the definition or name which it describes. -____ Small organic molecules that act as lubricants between polymer chains.

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

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

Classify the following polymer.

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

Structure and Bonding

Polar Covalent Bonds; Acids and Bases

Organic Compounds: Alkanes and Their Stereochemistry

Organic Compounds: Cycloalkanes and Their Stereochemistry

Stereochemistry at Tetrahedral Centers

An Overview of Organic Reactions

Alkenes and Alkynes

Reactions of Alkenes and Alkynes

Aromatic Compounds

Structure Determination: Mass Spectrometry, Infrared Spectroscopy, and Ultraviolet Spectroscopy

Structure Determination: Mass Spectrometry, Infrared Spectroscopy, and Ultraviolet Spectroscopy

Structure Determination: Nuclear Magnetic Resonance Spectroscopy

Organohalides: Nucleophilic Substitutions and Eliminations

Alcohols, Phenols, and Thiols; Ethers and Sulfides

Aldehydes and Ketones: Nucleophilic Addition Reactions

Carboxylic Acids and Nitriles

Carboxylic Acid Derivatives: Nucleophilic Acyl Substitution Reactions

Carbonyl Alpha-Substitution and Condensation Reactions

Amines and Heterocycles

Biomolecules: Amino Acids, Peptides, and Proteins

Amino Acid Metabolism

Biomolecules: Carbohydrates

Carbohydrate Metabolism

Biomolecules: Lipids and Their Metabolism

Biomolecules: Nucleic Acids and Their Metabolism

Orbitals and Organic Chemistry: Pericyclic Reactionse

Filters

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