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Exam 29: Organic Polymer Chemistry

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Question 1

Multiple Choice

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Which of the following is not true?

A) crystalline polymers are more opaque than amorphous polymers
B) thermoplastic polymers can be melted
C) polymers become flexible above their T_g
D) elastomers are elastic below T_g

E) A) and D)
F) A) and B)

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D

Question 2

Multiple Choice

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What is the name of the following polymer?

A) poly(ethylene terephthalamide)
B) poly(ethylene terephthalate)
C) poly(ethylene succinate)
D) poly(ethylene phenylate)

E) A) and C)
F) A) and D)

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Question 3

True/False

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Consider the polymeric structure below for amylose (a type of starch). The structure for the monomer is given below.

Which of the following compounds is not a free radical initiator? ​

2,4-Toluene diisocyanate is a very important chemical in the synthesis of polyurethanes used in foam pillows and freezer insulation and has the following structure.

Which of the following combinations of terms best describes the polymerization of propene to form polypropylene?

What type of polymer is shown?

The name of the polymer formed by the molecule shown below is _________________.

The following arrangement indicates a crosslinked polymer.

Which of the following cycloalkenes is least reactive toward ROMP?

Which term describes the arrangement of substituents on the segment of polypropylene shown below?

Classify each polymer below as step-growth or chain-growth. Place the appropriate term in the blank provide -_________________

Which type of polymerization is used to make high density polyethylene (HDPE) ?

What type of intermediate is formed in the polymerization of isobutylene with BF₃/H₂O?

A good initiator for a free radical addition polymerization is acetyl chloride.

Consider the following two structures. The following represents the repeating unit of the polymer formed by these two substances.

Which term describes the arrangement of substituents on the segment of polypropylene shown below?

Consider the structure given below which might be found in a protein. Answer the following questions by filling in the blank with the appropriate word or term. -Nitroethylene is expected to be _______ reactive than ethylene toward cationic polymerization.

What type of polymer is shown?

What type of intermediate is formed in the polymerization of styrene with AIBN?