Question 1

Which of the following is the best initiator for an anionic polymerization?

Accepted Answer

A)  BuLi 
B)  PhOH 
C)  (PhCO2)2 
D)  CH3CH(OCH3)2 
E)  BF3 
A)  BuLi 
B)  PhOH 
C)  (PhCO2)2 
D)  CH3CH(OCH3)2 
E)  BF3

Question 2

What name is given to nonvolatile liquids that dissolve in polymers and thus lower the attractions between the polymers' chains?

Accepted Answer

The answer of What name is given to nonvolatile liquids...

Question 3

Plexiglas is a:

Accepted Answer

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

Question 4

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 5

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). Draw three repeat units of the polymer that is formed with the appropriate stereochemistry.

Accepted Answer

The answer of Poly(lactic acid) is a biodegradable polymer that...

Question 6

Draw the structure of the polymer produced in the following reaction.

Accepted Answer

The answer of Draw the structure of the polymer produced...

Question 7

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 8

Which of the following is the best initiator for a free-radical polymerization?

Accepted Answer

A)  BuLi 
B)  PhOH 
C)  (PhCO2)2 
D)  CH3CH(OCH3)2 
E)  BF3 
A)  BuLi 
B)  PhOH 
C)  (PhCO2)2 
D)  CH3CH(OCH3)2 
E)  BF3

_{Which of the following is the best initiator for an anionic polymerization?}

What name is given to nonvolatile liquids that dissolve in polymers and thus lower the attractions between the polymers' chains?

Plexiglas is a:

Above T_m, crystalline polymers exist as ________.

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). Draw three repeat units of the polymer that is formed with the appropriate stereochemistry.

Draw the structure of the polymer produced in the following reaction.

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

Which of the following is the best initiator for a free-radical polymerization?

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

Exam 26: Synthetic Polymers

Which of the following is the best initiator for an anionic polymerization?

What name is given to nonvolatile liquids that dissolve in polymers and thus lower the attractions between the polymers' chains?

Plexiglas is a:

Above Tm, crystalline polymers exist as ________.

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). Draw three repeat units of the polymer that is formed with the appropriate stereochemistry.

Draw the structure of the polymer produced in the following reaction.

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

Which of the following is the best initiator for a free-radical polymerization?

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

_{Which of the following is the best initiator for an anionic polymerization?}

Above T_m, crystalline polymers exist as ________.