5.2 Addition Polymerisation

preparation of synthetic polymers through additionpolymerisation

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TABLE OF CONTENTS

1- Objectives

2- Addition Polymerisation

3- Quiz

Objectives

Explain the preparation of synthetic polymers through addition polymerisation (e.g: polyethylene, poly vinyl chloride, polystyrene, Teflon).

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(Tutorial: C3,C4 PLO2, MQF LOC ii)

Addition polymerization

Addition polymerization

Synthetic polymers

Synthetic polymers are polymers that are prepared in industries from monomers that have gone through polymerization process.

Polymerization

Polymerization is a process that combines monomers to form polymers.

addition polymerization

Addition polymerization is the addition reaction in which unsaturated monomers are joined together by covalent bonds to form a polymer without elimination of any small molecule.

Polymers obtained by addition polymerization are called addition polymers.

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addition polymerization

Addition polymer always involves the polymerization of monomers which have carbon-carbon double bond within the monomers.

-C=C-

Peroxide is used as initiator in addition polymerization.

example: hydrogen peroxide, H2O2

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Example of addition polymerization

Polyvinyl chloride

Teflon

Example of addition polymer

Polyethene

Polystyrene

Example of addition polymerization:

Formation of polyethene (polyethylene)

Formation of polyvinyl chloride

addition polymerization

Formation of polystyrene

Formation of Teflon

Problem Solving

Polyethylene is produced in industry through polymerisation process a) Draw the structure of its monomer b) Write the equation for the formation of polyethylene c) State the type of polymerisation process d) Give two uses of polyethylene

Problem Solving

Polyethylene a) Draw the structure of its monomer b) Write the equation for the formation of polyethylene

Problem Solving

Polyethylene: c) State the type of polymerisation process d) Give two uses of polyethylene

Addition polymerisation.

Making bottles, toys, pipes, coatings for electric cables.

quiz

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1/3

In order to form addition polymers, what is the functional group that a monomer must have?

–CONH2

–C=C-

-COOH

RIGHTANSWER

Addition polymerization is the addition reaction in which unsaturated monomers are joined together by covalent bonds to form a polymer without elimination of any small molecule.

2/3

What is the substance used as the initiator in addition polymerisation?

Peroxide

Ozone

Alcohol

Right answer

Peroxide is used as initiator in addition polymerization.

3/3

Select the monomer of polyethylene.

F2C=CF2

ClCH=CH2

H2C=CH2

Right answer

Monomer of polyethylene.

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