Additives To Polymers (Leaving Cert Engineering): Flashcards
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Additives in polymers
Additives in polymers
Substances added to enhance properties during manufacturing
Colour pigments
Colour pigments
Dyes added during manufacturing to control final colour of polymer product
Fillers
Fillers
Non-plastic materials to modify properties or reduce costs
Sawdust filler benefit
Sawdust filler benefit
Increases bulk/volume, reduces cost
Glass fibre benefit
Glass fibre benefit
Dramatically improves strength
Carbon fibre application
Carbon fibre application
Strong, lightweight composites for high-performance uses
Composite materials
Composite materials
Materials combining best properties of different substances
Plasticisers function
Plasticisers function
Increase flexibility and workability
Polymer degradation causes
Polymer degradation causes
UV radiation and oxygen
Stabilisers & antioxidants
Stabilisers & antioxidants
Slow degradation, extend product life
Flame retardants
Flame retardants
Reduce flammability, slow fire spread
Lubricants purpose
Lubricants purpose
Improve mouldability and flow during processing
Vulcanisation discoverer (year)
Vulcanisation discoverer (year)
Charles Goodyear (1844)
Vulcanisation process
Vulcanisation process
Sulphur creates crosslinks, converts rubber to thermoset
Crosslinks in vulcanised rubber
Crosslinks in vulcanised rubber
Connect polymer chains, create tough, durable material