1.2 Polymers Flashcards
What are the 3 steps for polymers
Fractional distillation, cracking, polycondensation/polymerisation
Why are polymers considered self finishing
As they can be pigmented during the manufacturing
What are polymers susceptible to
UV light
What are the 6 thermoplastics
PP, Acrylic, HIPS/ABS, Nylon, LD/HDPE, PVC/uPVC
What are thermoplastics
Polymers that can be softened and are formed at relatively low temperatures
What is a use of Acrylic
Signs
What is a use of PP
Hinged lids
What is a use of ABS/HIPS
LEGO
What is a use of nylon
cable ties
What is a use of PVC/uPVC
guttering
What is a use of LD/HDPE
Bin liners
What is the property of PP
Good fatigue resistance
What is the property of Acrylic
Very UV stable
What is the property of HIPS/ABS
Very tough
What is the property of Nylon
High temp resistance and low friction
What is the property of HD/LDPE
Cheap
What is the property of PVC/uPVC
Good weathering and chemical resistance
What is a use of Epoxy
resin in CFRP
What is a use of UF
plugs
What are the 4 thermosets
Epoxy, UF, MF, polyester resin
What is a use of MF
worksurfaces
What is a use of polyester resin
resin in GFRP
What is a property of MF
food safe
What is a property of polyester resin
brittle
What is a property of epoxy
tough
What is a property of UF
good electrical insulator
What are the 4 elastomers
Neoprene, silicone, natural rubber, butadiene rubber
What is a use of Neoprene
wetsuits, laptopcases
What is a use of silicone
sealant, ice cube cases
What is a use of natural rubber
tyres
What is a use of butadiene rubber
shoe soles
What is a property of neoprene
temp and impact resistant
What is a property of silicone
extreme temperatures
What is a property of natural rubber
cold resistance
What is a property of butadiene
wear resistant
What are the 4 biopols
PLA, Glycolide, PHB, potatopak
What is a use of PLA
3D printing
What is a use of Glycolide
films and wraps
What is a use of PHB
stiches
What is a use of potatopak
food trays
What are the 2 synthetic biopols
PLA, Glycolide
What biopol breaks down with water rather than microbe action
glycolide
What are the 3 +ves of biopols
Can use natural resources, can reduce landfill, can be grown
What are the 2 natural biopols
PHB, potatopak
What are the 5 -ves of biopols
Can promote a throw away culture, need space to be grown, don’t easily degrade, can’t be recycled, can produce methane