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Exam 26: Synthetic Polymers

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Question 61

Essay

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Provide a mechanism to show how H₂C C(CH₃)₂ is polymerized using BF₃ as the initiator.

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Question 62

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________ polymers result from rapid reaction of one molecule at a time with a growing polymer chain, usually with a reactive intermediate at the growing end of the chain.

A) Addition
B) Condensation
C) Step-growth
D) Amorphous

E) All of the above
F) B) and C)

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Question 63

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If the side groups of a polymer occur randomly on either side of the polymer backbone, then the polymer is called ________.

If the side groups of a polymer chain are generally on the same side of the polymer backbone, the polymer is called ________.

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

What type of polymer is formed from lactam monomers?

In polymerization reactions what purpose does benzoyl peroxide usually serve?

Is the polymer shown below an addition polymer or a condensation polymer?

Shown below is a segment of polypropylene. Which of the following terms describes the stereochemistry of the methyl substituents?

Provide a representation of atactic poly(acrylonitrile).

The monomer shown below, 1,1-bistrifluoromethylethylene, undergoes polymerization via:

Neoprene is a flexible, chemically resistant polymer used in shoe soles, hoses and wetsuits. Based on the polymer structure of neoprene, provide a structure for the monomer of neoprene.

Which of the following is a condensation polymer?

What substance results from the 1,4-polymerization of 1,3-butadiene?

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

An alternating copolymer is shown below. Is this an addition polymer or a condensation polymer?

From which of the following are water pipes commonly manufactured?

Why can't poly(vinyl alcohol) be synthesized directly from vinyl alcohol as shown below?

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

Is the polymer shown an addition polymer or a condensation polymer?