Ceramics, polymers, composites (AQA GCSE Chemistry): Flashcards
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Practise the cards
15 cards from this deck
How ceramics are made
How ceramics are made
Heating substances at very high temperatures
Soda-lime glass composition
Soda-lime glass composition
Sand, sodium carbonate, and limestone
Key property of borosilicate glass
Key property of borosilicate glass
Higher melting point, handles temp changes well
Examples of clay ceramics
Examples of clay ceramics
Pottery, bricks, and tiles
Definition of composites
Definition of composites
Materials combining two substances for better properties
Two components of fibreglass
Two components of fibreglass
Glass fibres (strength) & plastic matrix (binder)
Why composites are stronger
Why composites are stronger
Fibres give strength, matrix holds them together
Thermosoftening polymers when heated
Thermosoftening polymers when heated
Soften and melt
Why thermosoftening polymers soften
Why thermosoftening polymers soften
Held by weak intermolecular forces that weaken when heated
Key feature of thermosetting polymers
Key feature of thermosetting polymers
Cross-links between polymer chains
Thermosetting polymers when heated
Thermosetting polymers when heated
Do not soften or melt
LDPE temp & flexibility
LDPE temp & flexibility
~80°C, low strength but high flexibility
HDPE temp & strength
HDPE temp & strength
~110°C, high strength but low flexibility
LDPE typical uses
LDPE typical uses
Plastic bags and food wrap
HDPE typical uses
HDPE typical uses
Bottles and containers