- Created by: fraser ruthven
- Created on: 18-04-11 10:30
Natural Materials are things which Nature has created with out man made help
Wool, Wood and cotton are all natural things as man did not assist with its creation.
Synthetic Materials for example China and Plastic are things that man has changed. Man has changed the properties of the material and has turned into something else.
Melting Point: The point when a substance turns into a liquid
Strength: How much force it needs to break
Stiffness: How brittle an object is
Hardness: how difficult to scratch or cut an object
Density: Mass divided Volume of an object
Mean = Add all but outlyers divided by number
Range = highest minus the lowest
Repeat = As you might get an outlyer, exclude outlyers
Range = Helps us see difference in different charts.
Qualitative = looks at good data when
Quantitative = looks at lots of data
Correlation = looks at the relationship
Polymer = lots of monomers, makes up synthetic materials when a reaction takes place. This reaction is called polymerisation.
Monomer = One bead of the polymer chain.
Straight / Branch Chains
Straight = strong = HDPE
Branch = weak = LDPE
Other Factors that may affect
0000000 (stronger) 000 (weaker)
00000000 Strong Weak 0000000000
3. Crosslinks = stronger bortax (joins 2 branches together)
4. Plasticisers = Cornflour makes stronger (PVC) volcanistaion (for rubber use sulphur)
Depositing of Polymers
Good: Allows polymer to live its full life capacity.
Bad: Uses a lot of energy to melt and sort the materials.
Good: Takes up little space.
Bad: Gives off pollutants.
Good: Gives off little pollutants
Bad: Takes up lots of space