Thermo plastics Flashcards
How do the polymer chains in thermo plastics look?
o-o-o-o-o-o-o
o-o-o-o-o-o-o
o-o-o-o-o-o-o
o = monomer
Polymer chains, no cross links
What are nearly all synthetic polymers and do they biodegrade easily?
- Nearly all are oil based
- Not sustainable as they do not biodegrade easily (100+ years)
4 properties of thermo plastics?
- Remouldable
- Recyclabe
- Self coulored
- Self finished
What should all plastics display and what does it represent?
- The ‘recyclable logo’ to help separation for recycling.
- Numbers and letters tell you what plastic it is
ABS properties? (5)
High quality toys, mobile phones, safety helmets
-Hard
-Multicoloured
-Durable
-Shiny
-Expensive
(If stuck in an exam use this plastic!)
PET properties? (6)
Bottles and food containers
- Clear
- Cheap
- Crinkly feel
- Strong
- Very thin, 1/4mm
- Colour
PMMA acrylic properties? (6)
Headlight lens and shop signs
- Rainbow of colours
- Strong
- Quality feel
- Shiny
- Optically clearer than glass
- Does scratch easily
Polypropylene properties? (5)
Sandwich boxes
- Soft
- Supple
- Tough
- Durable
- Integral Hinges
HIPS properties? (1)
Cheap toys and calculator cases
- Stronger than P.S
Expanded P.S properties? (3)
Packaging, insulation, life jackets
- Plus 80% air
- Very light
- Buoyant
LDPE properties? (4)
Toothpaste tubes and carrier bags
- Disposable
- Thin 0.1mm
- Cheap
- Low density/soft
HDPE properties? (2)
Washing up bowls, buckets, milk bottles
- Disposable/semi disposable
- Clearish/coloured
Nylon properties? (1)
Clothes, bearings and gears
-Only self lubricating plastc
UPVC (unplasticised) properties? (2)
Window frames, gutters and pipes
- Rigid
- Hard
PVC properties? (3)
Packaging, tape, hose pipes
-Soft
-Stretchy
-Squidgy
(feels like LDPE)
