polymers Flashcards
polymer production
refinery gas = cool 25
gasoline petrol
naphtha
kerosene
diesel oil
fuel oil
residue = hot 350
LDPE
thermoplastics
very tough
good chemical resistance
weatherproof
65 degree safe working temp
carrier bags
HDPE
thermoplastics
weatherproof
tough
chemical resistance
65 degrees safe working temp
toys
buckets
bowls
polypropylene
thermoplastics
chemical resistance
good fatigue resistance
100 degrees safe working temp
rope
folders
HIPS
thermoplastics
hard
rigid
tough
70 degree safe working temp
yoghurt pots
single use drink cups
ABS
thermoplastics
extremely tough
hard
80 degree safe working temp
telephone handsets
calculator
PMMA
thermoplastics
tough
hard
good chemical resistance
95 degrees safe working temp
baths
NYLON
thermoplastics
tough
corrosion resistant
150 degree safe working temp
cable ties
uPVC
thermoplastics
rigid
tough
good weathering resistance
fire retardant
95 degree safe working temp
window frames
PVC
thermoplastics
tough
flexible weathering resistance
95 degree safe working temp
hose pipes
urea formaldehyde
thermoset
hard
heat resistant
electrical insulator
electrical fittings
melamine formaldehyde
thermoset
hard
heat resisistant
picnic ware
polyester resin
thermoset
heat resistant
brittle
castings used in lay up processes
boat hulls
epoxy resin
thermoset
rigid
clear
hard
tough
adhesives
electrical components
natural rubber
elastomers
high tensile strength
low elongation
electrical insulator
tyres
hoses
butadiene rubber
elastomer
excellent wear resistance
electrical insulator
shoe soles
conveyer belts
neoprene
elastomer
thermal resistance
weather resistance
electrical insulator
wetsuits
laptop cases
silicone
elastomer
flexible
poor abrasion
ice cube trays
cooking utensils
natural bio polymers
made from natural materials such as cellulose and starch
synthetic bio polymers
made from renewable resources but chemically engineered to breakdown quicker
oxydegradeable polymer
fine powder with exposure to oxygen degraded by microorganisms
programme dregrade
carrier bags
photodegradable polymer
bonds broken with exposure to UV light
used in agriculture
act as mulch
hydrodegradeable polymer
breaks down with exposure to water and micro organisms
degrade quicker than oxy
liquid detergent
chocolate box trays
implications of bio polymers
- produce methane gas when they decompose in landfill
- high temps to decompose , toxic residues
- natural bio needs land to grow crops
- natural can be formed from GM crops
- can’t be recycled
