Polymers Flashcards
Types of Polymer
Thermoset
Thermoplastic
What is a thermosetting plastic?
Properties of a thermosetting plastic
Examples of thermosetting plastics
urea formaldehyde (UF)
melamine formaldehyde (MF)
polyester resin
epoxy resin
What is a thermoplastic?
Properties of a thermoplastic?
What is an elastomer?
Examples of thermoplastic
low density polyethylene (LDPE)
high density polyethylene (HDPE)
polypropylene (PP)
high impact polystyrene (HIPS)
acrylonitrile butadiene styrene (ABS)
polymethylmethacrylate (PMMA)
nylon
rigid and flexible polyvinyl chloride (PVC)
Polyethylene terephthalate (PET)
Properties of an elastomer
Examples of elastomers
natural rubber
polybutadiene
neoprene
silicone
Thermoplastic Elastomer (TPE)
Stock forms of polymers
sheet
film
granules
rod and other extruded forms
foam
powder
Performance characteristics of polymers
toughness
elasticity
insulation (thermal and electrical)
UV resistance
ability to be moulded
resistance to chemicals and liquids
melting points
suitability for food packaging applications
biodegradability
recyclability
self finishing
ability to be combined with other polymers and/or additives.
What is a biodegradable polymer?
Examples of biodegradable polymers
corn starch polymers
potatopak
biopol (bio-batch additive)
polyactide (PLA)
polyhdroxyalkanoate (PHA)
water soluble: lactide, glycolide (Lactel and ecofilm)
Examples of polymer manufacture processes
vacuum forming
thermoforming
calendaring
line bending
laminating (layup)
injection moulding
blow moulding
rotational moulding
extrusion
compression moulding
