Chemistry-C10-Ceramics, Composites, Polymers
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- Created by: tonisha_
- Created on: 21-03-23 19:46
Most glass that we use is called?
soda lime glass
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What three things do we mix?
sand
sodium carbonate
limestone
sodium carbonate
limestone
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What do we then do to the mixture?
heat it
3 of 39
However this glass has a what?
low melting point
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This limits?
its uses
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What type of glass has a higher melting point than soda lime glass?
borosilicate
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What two things is it made of?
sand and boron trioxide
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How are clay ceramics made?
shape wet clay and heat it in a furnace
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Composites are made of _ materials?
2
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What are those two?
reinforcement
surrounded by matrix or binder material
surrounded by matrix or binder material
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What are examples of reinforcements?
fibres or fragments of one material
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A composites properties depends on what?
the properties of the materials it was made with
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What are three examples of composites?
carbon fibre composite
concrete
wood
concrete
wood
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What is the reinforcement of a carbon fibre composite?
fibres of carbon
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What is the matrix?
plastic resin
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What are its two properties?
strong and light
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Concrete is made from a mixture of sand and gravel called?
aggregate
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Wood is made from what fibres?
cellulose
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And has a matrix made of?
organic polymer
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A polymer is made from joining together a large number of what?
monomers
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The properties of a polymer depend on what two things?
the monomer its made from
the conditions used to make it
the conditions used to make it
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What two types of poly (ethene) are there?
low density
high density
high density
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Low density poly(ethene) is made from ethene at what type of temperature?
moderate
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And under what type of pressure?
high
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What properties will it have?
soft
flexible
flexible
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High density poly(ethene) is made from ethene at what type of temperature?
low
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What pressure?
low
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What else does it involve?
catalyst
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What are its properties?
hard
rigid
rigid
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Therefore what three things can we change to change a polymers properties?
pressure
temperature
catalyst
temperature
catalyst
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What two types of polymers are there?
thermosoftening
thermosetting
thermosetting
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What do thermosoftening polymers do when we heat them?
melt
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This is because they have _____ ______ forces between the ______ strands
because they have weak intermolecular forces between the polymer strands
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We can then ______ the polymer?
reshape
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When we cool them down?
they go back to solid
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Thermosetting polymer do what when we heat them?
do not melt
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This is because thermosetting polymers have very strong what?
crosslinks between polymer strands
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These are not broken by?
heat
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Therefore their shape is what?
strong
rigid
hard
rigid
hard
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Other cards in this set
Card 2
Front
What three things do we mix?
Back
sand
sodium carbonate
limestone
sodium carbonate
limestone
Card 3
Front
What do we then do to the mixture?
Back
Card 4
Front
However this glass has a what?
Back
Card 5
Front
This limits?
Back
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