Polymers (Properties) Flashcards
What are thermoforming polymers?
Polymers that can be reformed after initial forming
What are thermosetting polymers?
Polymers that cannot be reformed after initial forming
What are some physical properties of polymers?
Insulators
Lightweight
Chemically inert
Durable
How are most polymers sourced?
Synthesised from crude oil
What are generic polymer properties?
Tough
Lightweight
High strength to weight ratio
Waterproof
Resistant to corrosion and chemicals
Durable
How can UV degradation of polymers be prevented?
Polymers treated
Name some thermoplastics:
Polyethylene (PE)
Polyproplylene (PP)
Polystyrene (PS)
Polyvinyl Chloride (PVC)
Acrylic (PMMA)
Polyethylene Terephthalate (PET)
Name some thermosetting polymers:
Epoxy resin
Polyester resin
What are stock forms for polymers?
Sheet
Rods
Tubes
Granules
Why don’t polymers need finishing?
They are self finishing
What are the environmental impacts of polymers?
Non-biodegradable (landfill)
Ocean pollution
Toxic emissions
Fossil fuels
Recycling Polymers
Thermoplastics can be recycled by melting and reshaping.
Thermosets cannot be re-melted or recycled easily
What is PLA (a bioplastic)
A biodegradable plastic made from renewable resources like corn starch
Environmental Benefits of PLA
Breaks down faster than traditional plastics
Not same impact from crude oil
