GCSE Revision (Plastics detailed) AQA specification

T Andrews
Mind Map by T Andrews, updated 11 months ago More Less
Created by fampulli over 6 years ago
T Andrews
Copied by T Andrews over 4 years ago


Detailed plastics mindmap

Resource summary

GCSE Revision (Plastics detailed) AQA specification
1 two types
1.1 thermo-plastics
1.1.1 get soft when heated, allowing their shape to change- will harden in new shape
1.1.2 flxible
1.1.3 Most, plastics- available in sheets or pellet form
1.1.4 hundreds of diff types acrylic hard-wearing transparent or opaque Display Signs Roof Lights Machine Guards nylon clothes bearings gears polypropylene medical syringes rope crates storage boxes Polythene (HDPE) Pipes Milk crates Buckets High impact Polystyrene (HIPS) Vacuum forming in schools Casing for electronic products Packaging Expanded Polystyrene Soft and spongy, good insulator Sound and heat insulation Ceiling Tiles Packaging
1.2 thermo-sets
1.2.1 once formed, cannot be changed using heat
1.2.2 products that are heat-resitant and keep their shape Urea/Phenol Formaldehyde electrical sockets/plugs Melamine Formaldehyde hard, rigid and strong- plastic bowls, laminated surfaces exoxy resin and polyester resin reinforced with glass fibre- canoes good chem resitance, but can be brittle
1.2.3 are normally available as different chemicals to mix together hard and rigid cannot normally be recycled
2 most made form crude oil
2.1 most are synthetic materials
2.1.1 man- made, using chemical processes
2.2 drilling deep into ground/ sea
2.3 broken down into simple parts: monomers
2.3.1 attached together to form polymers: the pure form of any plastic
2.4 non-renewable
2.5 pollution and damage to environment
2.6 plastics often end up buried in landfill- and they take 100s of years to break down- so this is a problem
2.7 but some are made form bio-degradable sustainable sources
3 Forming plastics
3.1 Blow Moulding
3.2 Rotational Moulding
3.3 Injection Moulding
3.4 Vacuum Forming
3.5 Extrusion
3.6 Strip Heating
4 Natural
4.1 Latex
4.2 Amber
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