Ceramics, Polymers & Composites (AQA GCSE Chemistry): Flashcards
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How long used: ceramics & composites?
How long used: ceramics & composites?
Thousands of years
What are ceramics?
What are ceramics?
Solid materials, high melting points, not carbon compounds
Two examples of ceramics
Two examples of ceramics
Glass and clay
Soda-lime glass made from?
Soda-lime glass made from?
Sand, sodium carbonate, limestone
Borosilicate glass made from?
Borosilicate glass made from?
Sand and boron trioxide
Borosilicate vs soda-lime glass melting point
Borosilicate vs soda-lime glass melting point
Borosilicate higher
What are composites?
What are composites?
Materials from two or more different substances
Two parts of composite structure
Two parts of composite structure
Matrix/binder + reinforcement (fibres)
Reinforced concrete made from?
Reinforced concrete made from?
Cement around steel or iron rods
Polymer properties depend on?
Polymer properties depend on?
Monomers and production conditions
LDPE production conditions
LDPE production conditions
Moderate temp & high pressure
LDPE properties & uses
LDPE properties & uses
Flexible; plastic bags & bottles
HDPE production conditions
HDPE production conditions
Low temp & pressure with catalyst
HDPE properties & uses
HDPE properties & uses
More rigid; water tanks & drainpipes
Thermosetting vs thermosoftening: key difference
Thermosetting vs thermosoftening: key difference
Thermosetting has cross-links, won't soften; thermosoftening melts