PLASTIC Flashcards
1
Q
1.plasic products are made from…….which are chains of………..
A
POLYMERS
HYDRO-CARBONS
2
Q
2.these hydrocarbons come from…….which is drilled out of the ground
A
CRUDE OIL
3
Q
3.they are…..and comibined with other chemicals to make different plastics
A
REFINED
4
Q
4.they are then………in factories to make finished products
A
PROCESSED
5
Q
CRACKING
A
uses heat to break up the polymer chains into more useful products.
6
Q
NEGATIVE
A
- most use non-renewable resources (crude oil)
- most are not bio-degradable
- they are costly to recycle
- their production pollutes the plant
7
Q
POSITIVE
A
- several can be recycled
- some can be incinerated (burnt) to recover energy
- new bio-polymers are being developed
8
Q
THERMOPLASTICS (PROPERTIES)
A
- flexible when heated
- easily recycled
- can be re-formed
- plastic memory
9
Q
TYPES OF THERMOPLASTICS
A
POLYETHYLENE
HIGH DENSITY POLYETHYLENE
ACRYLIC
NYLON
10
Q
POLYETHYLENE
A
- clear, coloured easily
- recyclable, blow moulding
- food packing, bottles
11
Q
HIGH IMPACT POLYSTYRENE
A
- flat, coloured sheets
- flexible, vacuum forming, food safe
- food containers e.g yoghurt pots
12
Q
ACRYLIC
A
- thin+thick, bars, sheets
- tough but brittle, easily scratched
- car lights, modern baths
13
Q
NYLON
A
- smooth, film, sheet
- low friction,hard wearing
- clothing, tents, rope
14
Q
TYPES OF THERMO-SET PLASTICS
A
EPOXY RESIN
MELAMINE
15
Q
EPOXY RESIN
A
- 2 liquids (resin+hardener)
- sets clear and smooth
- stronger than normal resin
- waterproof coating, used in fibreglass
