Question 1

Which of the following monomers is least readily polymerized under conditions of anionic polymerization?

Accepted Answer

A)  isobutylene 
B)  acrylonitrile 
C)  methyl acrylate 
D)  methyl α-cyanoacrylate 
E)  methyl α-methacrylate 
A)  isobutylene 
B)  acrylonitrile 
C)  methyl acrylate 
D)  methyl α-cyanoacrylate 
E)  methyl α-methacrylate

Question 2

Between Tg and Tm, crystalline polymers exist as ________.

Accepted Answer

A)  thermoplastics which are flexible and moldable 
B)  liquids which are flexible and moldable 
C)  glasses of low flexibility 
D)  thermoplastics which are readily extruded to form fibers 
E)  liquids which are readily extruded to form fibers 
A)  thermoplastics which are flexible and moldable 
B)  liquids which are flexible and moldable 
C)  glasses of low flexibility 
D)  thermoplastics which are readily extruded to form fibers 
E)  liquids which are readily extruded to form fibers

Question 3

Dacron is a ________.

Accepted Answer

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

Question 4

Explain why polyamides tend to be crystalline polymers.

Accepted Answer

There is extensive hydrogen bo

Question 5

Which of the following monomers is most well-suited to cationic polymerization?

Accepted Answer

A)  isobutylene 
B)  ethylene 
C)  acrylonitrile 
D)  methyl α-methacrylate 
E)  methyl α-cyanoacrylate 
A)  isobutylene 
B)  ethylene 
C)  acrylonitrile 
D)  methyl α-methacrylate 
E)  methyl α-cyanoacrylate

Question 6

Classify neoprene, shown below, as either being an addition polymer or condensation polymer. Justify your answer.

Accepted Answer

Addition polymer. The polymer shows a co

Question 7

Provide the structure of the monomer from which   
is formed.

Accepted Answer

The answer of Provide the structure of the monomer from...

Question 8

When the polymer below is hydrolyzed under acidic conditions, what compounds are formed?

Accepted Answer

The answer of When the polymer below is hydrolyzed under...

Question 9

Poly(lactic acid) is a biodegradable polymer that is used in 3D printing. It can be made through the polymerization of L-lactic acid (below). Will the polymer be a step-growth or chain-growth polymer?

Accepted Answer

Step-growt

Question 10

Provide the structure of the monomer from which Teflon is formed.

Accepted Answer

The answer of Provide the structure of the monomer from...

Question 11

What are copolymers?

Accepted Answer

Copolymers are mater

Question 12

Which type of polymer is not typically formed via step-growth polymerization?

Accepted Answer

A)  polyamide 
B)  polyester 
C)  polycarbonate 
D)  polyurethane 
E)  polyethylene 
A)  polyamide 
B)  polyester 
C)  polycarbonate 
D)  polyurethane 
E)  polyethylene

Question 13

Which of the following is not a condensation polymer?

Accepted Answer

A)  Dacron 
B)  poly(propylene) 
C)  nylon 6 
D)  Lexan polycarbonate 
E)  Mylar 
A)  Dacron 
B)  poly(propylene) 
C)  nylon 6 
D)  Lexan polycarbonate 
E)  Mylar

Question 14

Predict the monomer units that combine to form polyurethane.

Accepted Answer

The answer of Predict the monomer units that combine to...

Question 15

What type of polymer is shown below?

Accepted Answer

A)  polyester 
B)  polyamide 
C)  polyurethane 
D)  polycarbonate 
E)  polypropylene 
A)  polyester 
B)  polyamide 
C)  polyurethane 
D)  polycarbonate 
E)  polypropylene

Question 16

An alternating copolymer is shown below. What two monomers were used to make this polymer?

Accepted Answer

The answer of An alternating copolymer is shown below. What...

Question 17

Below Tg, crystalline polymers exist as ________.

Accepted Answer

A)  thermoplastics which are flexible and moldable 
B)  liquids which are flexible and moldable 
C)  glasses of low flexibility 
D)  thermoplastics which are readily extruded to form fibers 
E)  liquids which are readily extruded to form fibers 
A)  thermoplastics which are flexible and moldable 
B)  liquids which are flexible and moldable 
C)  glasses of low flexibility 
D)  thermoplastics which are readily extruded to form fibers 
E)  liquids which are readily extruded to form fibers

Question 18

Named for a pair of Nobel Prize winners, ________ catalysts, which are composed of aluminum- and titanium-containing Lewis acids, provide a high measure of stereocontrol in alkene polymerizations.

Accepted Answer

The answer of Named for a pair of Nobel Prize...

Question 19

Provide the structure of poly(isobutylene).

Accepted Answer

The answer of Provide the structure of poly(isobutylene)....

Question 20

What type of polymer is formed by the transesterification of dimethyl terephthalate with 1,4-di(hydroxymethyl)cyclohexane?

Accepted Answer

A)  polyurethane 
B)  polyamide 
C)  polyester 
D)  polycarbonate 
E)  polyethylene 
A)  polyurethane 
B)  polyamide 
C)  polyester 
D)  polycarbonate 
E)  polyethylene

Exam 26: Synthetic Polymers

Which of the following monomers is least readily polymerized under conditions of anionic polymerization?

Between Tg and Tm, crystalline polymers exist as ________.

Dacron is a ________.

Explain why polyamides tend to be crystalline polymers.

Which of the following monomers is most well-suited to cationic polymerization?

Classify neoprene, shown below, as either being an addition polymer or condensation polymer. Justify your answer.

Provide the structure of the monomer from which is formed.

When the polymer below is hydrolyzed under acidic conditions, what compounds are formed?

Poly(lactic acid) is a biodegradable polymer that is used in 3D printing. It can be made through the polymerization of L-lactic acid (below). Will the polymer be a step-growth or chain-growth polymer?

Provide the structure of the monomer from which Teflon is formed.

What are copolymers?

Which type of polymer is not typically formed via step-growth polymerization?

Which of the following is not a condensation polymer?

Predict the monomer units that combine to form polyurethane.

What type of polymer is shown below?

An alternating copolymer is shown below. What two monomers were used to make this polymer?

Below Tg, crystalline polymers exist as ________.

Named for a pair of Nobel Prize winners, ________ catalysts, which are composed of aluminum- and titanium-containing Lewis acids, provide a high measure of stereocontrol in alkene polymerizations.

Provide the structure of poly(isobutylene).

What type of polymer is formed by the transesterification of dimethyl terephthalate with 1,4-di(hydroxymethyl)cyclohexane?

Structure and Bonding

Acids and Bases; Functional Groups

Structure and Stereochemistry of Alkanes

The Study of Chemical Reactions

Stereochemistry

Alkyl Halides; Nucleophilic Substitution

Structure and Synthesis of Alkenes; Elimination

Reactions of Alkenes

Structure and Synthesis of Alcohols

Reactions of Alcohols

Infrared Spectroscopy and Mass Spectrometry

Nuclear Magnetic Resonance Spectroscopy

Ethers, Epoxides, and Thioethers

Conjugated Systems, Orbital Symmetry, and Ultraviolet Spectroscopy

Aromatic Compounds

Reactions of Aromatic Compounds

Ketones and Aldehydes

Amines

Carboxylic Acids

Carboxylic Acid Derivatives

Condensations and Alpha Substitutions of Carboxyl Compounds

Carbohydrates and Nucleic Acids

Amino Acids, Peptides, and Proteins

Lipids

Filters

Between T_g and T_m, crystalline polymers exist as ________.

Below T_g, crystalline polymers exist as ________.