Plastics

Created by: Sofya Abramchuk
Created on: 04-04-13 13:10

Long-cain molecule

The main constituent part of a polymer. The long chain molecule is made up of a series of atoms- in the case of hydrocarbons these would be made up of hydrogen and carbon along with elements such as oxygen

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Cellulose

A consistent part of timber. Approximately 55 per cent of a tree is made up of cellulose. It is used to produce a cellulose-based polymers.

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Thermoplastics

These polymers are formed from long chain molecules which are held together by strong electrostatic forces, called Van der Walls bonds. With an aportation of heat. these bonds can be released, allowing heat-softed material to be reshaped repeatedly

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Thermosets

Are the polymers that consist of long-chain molecules that undergo chemical change with a help of a catalyst or "heat + pressure" application, resulting permanent rigid cross-links, that do not allow the material to be softened and reshaped

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Elastomers

These are polymers that have good elasticity, i.e. they can be distorted under pressure but will return to their original shape when the pressure is removed

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General properties of polymers

Good electrical conductors

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Card 2

Front

A consistent part of timber. Approximately 55 per cent of a tree is made up of cellulose. It is used to produce a cellulose-based polymers.

Back

Cellulose

Card 3

Front

Back

Card 4

Front

Back

Card 5

Front

These are polymers that have good elasticity, i.e. they can be distorted under pressure but will return to their original shape when the pressure is removed

Back

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Plastics