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Page 1: Monomers and Polymers

04/19/23Monomers and PolymersMonomers and Polymers

Ethene

Ethene is called a MONOMER because it is just one small molecule. We can use ethene to make plastics…

Step 1: Break the double bond

Step 2: Add the molecules together at high temperature & pressure:

This molecule is called POLYETHENE, and the process that made it is called POLYMERISATION

Page 2: Monomers and Polymers

04/19/23Another way of drawing it…Another way of drawing it…Instead of circles, let’s use letters…

Ethene

C C

HH

HH

C C

HH

HH

Ethene

H

C C

H

HH

H

C C

H

HH

Poly(e)thene

General formula for addition polymerisation:

C Cn C C

n

C Cn

H CH3

HH

C Cn

H CH3

HH

polythene

polypropene

Ethenemonomers

Propenemonomers

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04/19/23


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