Polymers

  • Created by: Emily
  • Created on: 21-03-13 09:51
What are plastics?
Plastics are a group of materials made up of long chains of molecules.
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What are Hydrocarbons?
Long chain molecules which consist of Hydrogen and Carbon.
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What is a polymer?
A polymer consists of long chains of monomers. Normally chains are randomly arranged and form a 3D pattern.
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What is the process which forms Polymers?
Polymerisation
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What is the length of a Polymer?
Fully uncoiled, one polymer molecule's chain length may be 10,000 times the diameter of the chain.
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What gives the material its flexability?
The length of the chain.
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What is Tg?
Tg stands for glass transition temperature. This is the temperature at which a polymer moves from a hard glass like state to a softer rubbery state.
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Describe a semi-synthetic polymer
Cellulose is a natural material occurring in plant fibres.
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What is Cellulose mixed with?
Acetic acid to produce cellulose acetate.
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Describe another semi-synthetic polymer
Caesin, by products of milk are used to create the polymer.
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What is casein used in the production of?
Buttons.
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What are the sources of purely synthetic plastics?
Coal, oil and gas.
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What process is used in the manufacture of purely synthetic plastics?
Thermal Cracking
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What is Cellulose?
A constituent part of timber, approximately 55% of a tree is made up of cellulose. It can also be used to produce a cellulose - based polymer.
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What is Biopol?
A polymer made from natural cellulose, which can be used to make biodegradable packaging.
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What is degradation?
The deterioration of polymers.
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Other cards in this set

Card 2

Front

What are Hydrocarbons?

Back

Long chain molecules which consist of Hydrogen and Carbon.

Card 3

Front

What is a polymer?

Back

Preview of the front of card 3

Card 4

Front

What is the process which forms Polymers?

Back

Preview of the front of card 4

Card 5

Front

What is the length of a Polymer?

Back

Preview of the front of card 5
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