Polymers Flashcards
What are thermoforming polymers?
Thermoforming polymers can be moulded into almost any shape when heated. They can be re heated and reshaped. They are also recyclable. Examples include : acrylic, hips, Hdpe, pp, pvc and pet.
What are the properties and common uses of acrylic
Properties common uses
.Hard. .car light units, bath tubs, shop displays
.Excellent optical quality
.good resistance to wethering
Stretches easily
What are the properties and common uses of High-impact polystyrene (HIPS)
properties. Common uses
. Tough, hard and rigid. .childrens toys, yoghurt pots and refrigerator linings
.good impact resistance
. Light weight
What are the properties and common uses of high-density polythene (HDPE)
Properties. Common uses
.hard and stiff. .washing up bowls, milk crates, bottles and pipes
.excellent chemical resistance
What are the properties and common uses of polypropylene (pp)
Properties .Tough .Good heat and chemical resistance .Lightweight .Fatique resistant
Common uses
Toys, DVD & blu-ray cases, food
packaging film, bottle caps and
medical equipment
What are the common uses and properties of polyvinyl chloride (pvc)
Properties .Hard and tough .Good chemical and weather resistance .LOw cost .Can be rigid or flexible
Common uses
Pipes, guttering, window frames
What are the common uses and properties of polyethylene terephthate (PET)
Properties .Tough and durable .Lightweight .Food safe .Impermeable to water .low cost
Common uses
Drinks bottles, food packaging
What are thermosetting Polymers
They can also be shaped by heat but only once
They are not recyclable
What are the properties and common uses of Epoxy resin
Properties
.Electrical insulator
.Good chemical and wear resistance
Common uses
Adhesives such as aralditeTM,
PC component encapsulation
What are the common uses and properties of Melamine formaldehyde (MF)
Properties
.Stiff, hard and strong
.Excellent resistance to heat,
.scratching and staining
Common uses
Kitchen work-surface laminates,
tableware
What are the common uses and properties of phenol formaldehyde (PF)
Properties .hard . Heat and chemical reistant .good electrical insulator .limited colors available
Common uses
Electrical fittings, sauce pan handles and bowling balls
What are the common uses and properties of Polyester resin
Properties
. Brittle but becomes tough when laminated with fibre glass
. Hard and resistant to UV
Common uses
GRP boats and car body pannels
What are the properties and common uses of Urea formaldehyde (UF)
Properties
.stiff and hard
.heat resistant
.good electrical insulator
Common uses
White electrical fittings, toilet seats and adheasive used in MDF
What are polymer addatives ?
Polymer adatives can enhance a polymer
Plasticisers
Can be added to make the polymer soft and flexible, can often be found in pvc
