Common Polymers used in Engineering (Leaving Cert Engineering): Flashcards
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Four main polymer categories
Four main polymer categories
Natural polymers, thermoplastics, thermosets, elastomers
Thermoplastics heating behaviour
Thermoplastics heating behaviour
Soften when heated, harden when cooled, repeatable
Thermosets heating behaviour
Thermosets heating behaviour
Permanent chemical changes, form crosslinks, cannot reverse
Source of shellac
Source of shellac
Beetle dung
Common name for PTFE
Common name for PTFE
Teflon
Common names for PMMA
Common names for PMMA
Acrylic or Perspex
LDPE properties
LDPE properties
Flexible and tough
HDPE properties
HDPE properties
Stronger and more rigid
Key properties of PP (Polypropylene)
Key properties of PP (Polypropylene)
Tough and wear resistant
Key properties of PTFE
Key properties of PTFE
Heat resistant and non-stick
Uses of PVC
Uses of PVC
Window frames, plumbing, cable trunking
Uses of Bakelite
Uses of Bakelite
Frying pan handles, electrical components
Composition of vulcanised rubber
Composition of vulcanised rubber
Natural rubber with sulphur
Key property of elastomers
Key property of elastomers
Can stretch and return to original shape
Use of silicone
Use of silicone
Bathroom sealant