Polymerisation Flashcards

1
Q

Man-made plastics are made from…

A

polymers

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2
Q

what is a monomer

A

a small molecule

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3
Q

A polymer is made from…

A

lots of monomers joined together.

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4
Q

Monomer molecules usually contain

A

carbon atoms

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5
Q

Monomers can be joined together to make polymers by…

A

high pressures

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6
Q

When monomers are joined together we call the reaction…

A

polymerisation

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7
Q

Different types of monomers can be used to create

A

different polymers

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8
Q

Different polymers have different…

A

properties

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9
Q

List some properties of different polymers

A

How strong, stretchy and easy to mould they are.

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10
Q

Which polymer are plastic milk bottles made from and why?

A

High Density Polyethene because it is strong and rigid.

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11
Q

Which polymer are plastic bags and squeezy bottles made from and why?

A

Low Density Polyethene because they are light and stretchable.

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12
Q

Why should low density polyethene not be used for anything that will get hot?

A

Low density polyethene has a low melting point

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13
Q

Describe the properties of PVC

A

Strong
Durable
Can be made rigid OR stretchy

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14
Q

What is rigid PVC used to make?

A

window frames and piping

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15
Q

What is stretch PVC used to make?

A

synthetic leather

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16
Q

What is polystyrene foam used in?

A

to protect things in packaging

Coffee cups

17
Q

Why is polystyrene foam used to make coffee cups?

A

Because polystyrene is a good thermal insulator

18
Q

Plastic kettles are made from polymers such as _________ and ________ because

A

melamine resin and polypropene because they are heat resistant.

19
Q

What does synthetic mean?

20
Q

Cotton, wool and silk have been replaced by which synthetic fibres?

A

nylon and polyester

21
Q

What are the advantages of synthetic fibres>

A

lighter
more durable
water-resistant
cheaper

22
Q

What are the disadvantages of synthetic fibres?

A

They aren’t breathable

Uncomfortable against the skin.

23
Q

Wood has been replaced by which synthetic material?

24
Q

What are the advantages of rigid PVC window frames?

A

Weather-resistant
Strong
Durable
Window frames more secure and don’t need to be painted

25
What is the disadvantage of rigid PVC window frames?
They do not look as good as wooden frames.