Question 1

Provide a mechanism for the free-radical polymerization of styrene. The radical initiator may be symbolized by I∙.

Accepted Answer

The answer of Provide a mechanism for the free-radical polymerization...

Question 2

Ethylene oxide can be polymerized to form Carbowax. What conditions are best for the polymerization of ethylene oxide?

Accepted Answer

A)  anionic 
B)  cationic 
C)  free-radical 
D)  carbene 
E)  none of the above 
A)  anionic 
B)  cationic 
C)  free-radical 
D)  carbene 
E)  none of the above

Question 3

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 4

Explain why H2C=CHCO2CH3 does not undergo cationic polymerization.

Accepted Answer

No reasonably stable

Question 5

Draw the products which would result if poly(ethylene terephthalate) were hydrolyzed in hot aqueous NaOH.

Accepted Answer

The answer of Draw the products which would result if...

Question 6

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 7

Provide the structure of the polymer that is formed from the monomer shown below.

Accepted Answer

The answer of Provide the structure of the polymer that...

Question 8

"Super" glues are typically composed of what polymer?

Accepted Answer

A)  poly(acrylonitrile) 
B)  poly(methyl a-cyanoacrylate) 
C)  polystyrene 
D)  polypropylene 
E)  poly(methyl a-methylacrylate) 
A)  poly(acrylonitrile) 
B)  poly(methyl a-cyanoacrylate) 
C)  polystyrene 
D)  polypropylene 
E)  poly(methyl a-methylacrylate)

Question 9

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 10

Provide the structure of atactic polystyrene.

Accepted Answer

The answer of Provide the structure of atactic polystyrene....

Question 11

What type of polymer is Lexan?

Accepted Answer

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

Question 12

Provide the structure of each monomer unit used in the formation of the following polymer.

Accepted Answer

The answer of Provide the structure of each monomer unit...

Question 13

Provide a representation of syndiotactic polypropylene.

Accepted Answer

The answer of Provide a representation of syndiotactic polypropylene....

Question 14

Nylon 6 is a:

Accepted Answer

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

Question 15

Provide a representation of atactic poly(acrylonitrile).

Accepted Answer

The answer of Provide a representation of atactic poly(acrylonitrile)....

Question 16

Which type of polymer, isotactic or atactic, tends to be stronger and stiffer? Explain briefly.

Accepted Answer

Isotactic polymers tend to be stronger a

Question 17

Above 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 18

Provide the structure of poly(isobutylene).

Accepted Answer

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

Question 19

When a plasticizer is added to a polymer, the overall effect is to ________ the crystallinity of the polymer and ________ its Tg.

Accepted Answer

A)  reduce, lower 
B)  increase, lower 
C)  increase, raise 
D)  reduce, raise 
E)  eliminate, raise 
A)  reduce, lower 
B)  increase, lower 
C)  increase, raise 
D)  reduce, raise 
E)  eliminate, raise

Question 20

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

Exam 26: Synthetic Polymers

Provide a mechanism for the free-radical polymerization of styrene. The radical initiator may be symbolized by I∙.

Ethylene oxide can be polymerized to form Carbowax. What conditions are best for the polymerization of ethylene oxide?

What type of polymer is shown below?

Explain why H2C=CHCO2CH3 does not undergo cationic polymerization.

Draw the products which would result if poly(ethylene terephthalate) were hydrolyzed in hot aqueous NaOH.

Dacron is a:

Provide the structure of the polymer that is formed from the monomer shown below.

"Super" glues are typically composed of what polymer?

Below Tg, crystalline polymers exist as:

Provide the structure of atactic polystyrene.

What type of polymer is Lexan?

Provide the structure of each monomer unit used in the formation of the following polymer.

Provide a representation of syndiotactic polypropylene.

Nylon 6 is a:

Provide a representation of atactic poly(acrylonitrile).

Which type of polymer, isotactic or atactic, tends to be stronger and stiffer? Explain briefly.

Above Tm, crystalline polymers exist as:

Provide the structure of poly(isobutylene).

When a plasticizer is added to a polymer, the overall effect is to ________ the crystallinity of the polymer and ________ its Tg.

What type of polymer is shown below?

Introduction and Review

Structure and Properties of Organic Molecules

Structure and Stereochemistry of Alkanes

The Study of Chemical Reactions

Stereochemistry

Alkyl Halides: Nucleophilic Substitution and Elimination

Structure and Synthesis of Alkenes

Reactions of Alkenes

Alkynes

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

Explain why H₂C=CHCO₂CH₃ does not undergo cationic polymerization.

When a plasticizer is added to a polymer, the overall effect is to the crystallinity of the polymer and its Tg.