Flashcards
Sem título
Flashcards do conjunto (7)
- 1What is the difference between a natural and synthetic material? List 3 example of eachNatural
- silk
- wood
-coal
-gold
Synthetic
- polyester
-nylon
-glass - 2Why might some scientists be concerned about nanotechnology?could be toxic to some people
may be able to get into our bloodstream and cause harm to the brain - 3What is branching and how does it change the properties of the material?The side branches stop the polymer molecules from lining up regularly. The material has lower density, weaker, more flexible and lower melting point.
- 4What is fractional distillation and how does it work?separation of a liquid mixture into fractions differing in boiling point (and hence chemical composition) by means of distillation, typically using a fractionating column.
- 5What is polymerisation?Polymerisation is the process of many monomers joining together to make a polymer. This is an addition reaction.
- 6List some uses of nanotechnology-Sports equipment
-clothing
-healthcare - 7What does a plasticiser do to the properties of a material
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- FlashCards sobre Sem título, criado por Emily Atkinson em 10-02-2016.
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- Emily Atkinson
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