Chemistry C1 5.2 Making polymers from alkenes.

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What are plastics made of?
Polymers.
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What are polymers?
Polymers are large molecules made when many small molecules (monomers) join together.
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What can alkenes be used to make?
Polymers such as poly(ethene) and poly(propene).
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How do the bonds in the monomer change in the polymer?
Double bonds in the monomer become single bonds in the polymer when the molecules have joined together.
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What are plastics made of very large molecules called?
Polymers.
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What are the small molecules used to make polymers called?
Monomers.
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What is the reaction to make a polymer called?
Polymerisation.
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What can lots of ethene (C_(2)H_(4)) molecules join together to form?
Poly(ethene), commonly known as polythene.
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What happens in the reaction of ethene to poly(ethene)?
In the polymerisation reaction the double bond in each ethene molecule becomes a single bond and thousands of ethene molecules join together in long chains.
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What everyday items are made from alkenes?
Many of the plastics we use as bags, bottles, containers and toys.
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How are polymers made?
From many small molecules or monomers that react or join together or polymerise to make a very large or long molecule.
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How many monomers are there in a poly(ethene) molecule?
Thousands or a very large number.
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Why can we make polymers from alkenes but not from alkanes?
Alkenes are more reactive, unsaturated and have a double bond whereas alkanes are unreactive, saturated and do not have a double bond.
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**LEARN TO RECOGNISE MONOMERS AND POLYMERS FRO DIAGRAMS AND BE ABLE TO DRAW THE STRUCTURE OF THE POLYMER MADE FROM A GIVEN MONOMER**
**LOOK UP DIAGRAMS AND REPRESENTATIONS OF POLYMERISATION OF ALKENES****
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Card 2

Front

What are polymers?

Back

Polymers are large molecules made when many small molecules (monomers) join together.

Card 3

Front

What can alkenes be used to make?

Back

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Card 4

Front

How do the bonds in the monomer change in the polymer?

Back

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Card 5

Front

What are plastics made of very large molecules called?

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