Material Quality C2 Flashcards
Name some elements of some properties?
Melting point, strength, stiffness, hardness and density
How do you make something a fair test?
Measured many times, keep the experiment the same, no changes.
Where do you find synthetic polymers?
Earths crust.
Where do natural polymers come from?
Cotton for plants
Silk from animals
Limestone and iron from the earths crust.
Name where we can use polymers?
Plastic cup or plastic bowls
Wetsuits
Body armour
What is crude oil made of?
Hydrocarbon chains (or varying lengths)
How is crude oil separated?
Fractional distillation
Name some properties of larger hydrocarbons?
They have more attractive forces between them, so more energy is need to separate them, resulting in higher boiling points.
What are different fractions used for?
Fuels and lubricants. Some are used for raw materials.
What does each fraction contain?
Small range of molecules.
What does the strength,stiffness and hardness of plastics link to?
The amount of energy needed to separate the molecule chains.
Small molecule chains called monomers can join together to form what?
Polymers
What does the polymer strength depend on?
Chain length, cross-linking, plasticisers and increased crystallinity.
How can nanotechnology occurs?
Accident or by design
A key factor of nanoparticles is?
Their larger surface area compared to their volume.
