Flashcards
Plastics
Cards in this deck (15)
- 1Long-chain moleculeThe main constituent part of a polymer. The long-chain molecule is made up of a series of atoms - in the case of the hydrocarbons these would be made up of hydrogen and carbon along with elements such as oxygen.
- 2PolymerThe proper term for a plastic material.
- 3CelluloseA constituent part of timber. Approximately 55 percent of tree is made up of cellulose. This material can be used to produce a cellulose based polymer.
- 4ThermoplasticsMaterials that can be repeatedly reheated and remoulded.
- 5ThermosetsThese undergo a chemical change resulting in them becoming permanently rigid i.e. they can't be reheated and reshaped.
- 6ElastomersThese 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.
- 7General properties of plastics- They are good electrical and thermal insulators
-They have a good strength to weight ratio. This does not mean they are strong materials, just that they have good strength compared to their weight.
- Generally, they have good atmospheric and chemical corrosion resistance. - 8ABS- Thermoplastic
- Acrylonitrile Butadiene Styrene
- High impact strength
- Scratch resistant
- Lightweight
- Durable
- Used in: kitchen products, mobile cases, monitor cases, safety helmets, toys, car parts, household telephones - 9CA- Thermoplastic
- Cellulose Acetate
- Tough and rigid
- Transparent
- Lightweight with good strength
- Non flammable
- Used in: photographic film, handles for cutlery, cupboard door knobs, frames for glasses - 10Nylon- Thermoplastic
- Polyamide
- Hard
- Tough
- Resistant to wear with a low coefficient of friction
- Used in: bearings, gears, curtain rail fittings and clothing - 11PMMA (PolyMethylMethAcrylate) AKA Acrylic- Thermoplastic
- Acrylic
- Food-safe
- Tough
- Hard
- Durable
- Easily machined
- Used in: light units, illuminated signs, lenses for car lights - 12PP- Thermoplastic
- PolyPropylene
- Lightweight
- Food-safe
- Good impact resistance even at low temperatures
- Good chemical resistance
- Used in: food containers, medical equipment, string and rope - 13HIPS- Thermoplastic
- High Impact Polystyrene
- Good strength and stiffness
- Lightweight
- Good impact resistance even at low temperatures
- Used in: toys and refrigerator linings - 14PS- Thermoplastic
- Polystyrene
- Rigid
- Colourless
- Lightweight
- Low impact strength
- Used in: packaging, disposable cups and plates, containers - 15Expanded Polystyrene- Thermoplastic
- Floats
- Good sound and heat insulator
- Lightweight
- Low strength
- Used in: Packaging, disposable cups, sound and heat insulation
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- A level Product Design (Materials, components and application) Flashcards on Plastics, created by Alex Naylor on 22/11/2016.
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- Alex Naylor
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