Question 1

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, raiseF) A) and B)
G) B) and E)

Question 2

What type of polymer is shown below?

Accepted Answer

A)   polyester
B)   polyamide
C)   polyurethane
D)   polycarbonate
E)   polypropyleneF) B) and D)
G) B) and C)

Question 3

Provide a representation of syndiotactic polypropylene.

Accepted Answer

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

Question 4

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 5

"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) F) B) and C)
G) A) and B)

Question 6

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.F) C) and D)
G) A) and B)

Question 7

Provide the structure of atactic polystyrene.

Accepted Answer

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

Question 8

Nylon 6 is a:

Accepted Answer

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

Question 9

Explain why H2C=CHCO2CH3 does not undergo cationic polymerization.

Accepted Answer

No reasonably stable...

Question 10

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.F) A) and D)
G) A) and C)

Question 11

Provide the structure of poly(isobutylene).

Accepted Answer

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

Question 12

What type of polymer is shown below?

Accepted Answer

A)   polyester
B)   polyamide
C)   polyurethane
D)   polycarbonate
E)   polypropyleneF) A) and D)
G) None of the above

Question 13

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 aboveF) D) and E)
G) None of the above

Question 14

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 15

Dacron is a:

Accepted Answer

A)   polyester.
B)   polyamide.
C)   polycarbonate.
D)   polyurethane.
E)   none of the aboveF) C) and E)
G) A) and D)

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

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 18

Provide a representation of atactic poly(acrylonitrile).

Accepted Answer

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

Question 19

What type of polymer is Lexan?

Accepted Answer

A)   polyester
B)   polyamide
C)   polyurethane
D)   polycarbonateE) A) and D)
F) A) and C)

Question 20

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...

Exam 26: Synthetic Polymers

What type of polymer is shown below?

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Explain why H2C=CHCO2CH3 does not undergo cationic polymerization.

Correct AnswerverifiedNo reasonably stable...View AnswerShow Answer

What type of polymer is shown below?

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What type of polymer is Lexan?

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Provide the structure of atactic polystyrene.

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

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Provide a representation of syndiotactic polypropylene.

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Provide the structure of poly(isobutylene).

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Below Tg, crystalline polymers exist as:

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

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

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

Correct AnswerverifiedIsotactic polymers tend to be stronger a...View AnswerShow Answer

Above Tm, crystalline polymers exist as:

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"Super" glues are typically composed of what polymer?

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

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

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Nylon 6 is a:

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

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Provide a representation of atactic poly(acrylonitrile).

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Dacron is a:

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Explain why H₂C=CHCO₂CH₃ does not undergo cationic polymerization.

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No reasonably stable...
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Isotactic polymers tend to be stronger a...
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When a plasticizer is added to a polymer, the overall effect is to the crystallinity of the polymer and its Tg.

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