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Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692

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BuyFindarrow_forward

Chemistry In Focus

7th Edition
Tro + 1 other
Publisher: Cengage Learning,
ISBN: 9781337399692
Chapter 15, Problem 55E
Textbook Problem
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Draw a section of the polyethylene polymer about five monomers long. Show how some hydrogen atoms can be substituted to form each of the following:

a. polyisobutylene

b. polytetrafluoroethylene

c. polymethylmethacrylate

Interpretation Introduction

Interpretation:

A section of polyethylene polymer with given length is to be drawn and the way some hydrogen atoms can be substituted to form the given compounds is to be shown.

Concept Introduction:

Polymers are formed by joining small units called monomers.

Polyethylene is the simplest polymer formed from ethene.

Explanation of Solution

a) Polyisobutylene

Polyethylene is the simplest polymer formed from ethene. A section of polyethylene containing five molecules can be formed as follows:

CH2CH2-CH2CH2-CH2CH2-CH2CH2-CH2CH2

Isobutene contains three methyl groups, which are directly attached to the central carbon atom. It can be shown as follows:

So, both the hydrogen atoms are replaced by methyl groups on alternating carbon atoms to make polyisobutene from polyethylene. It can be shown as follows:

b) Polytetrafluoroethylene

Polyethylene is the simplest polymer formed from ethene. A section of polyethylene containing five molecules can be formed as follows:

CH2CH2-CH2CH2-CH2CH2-CH2CH2-CH2CH2

Tetrafluoroethylene contains fluorine groups, which are directly attached to the central carbon atom

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Chemistry In Focus
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