Topic 4.2D: Plastic

Question 1

Thermoplastics

Answer 1

linear chain molecules with weak secondary bonds between chains, can be reformed

Question 2

thermoset plastics

Answer 2

linear chain molecules with strong primary bonds between the adjacent polymer chains

Question 3

Polypropylene (thermo)

Answer 3

easily formed, used for: shopping bags, packaging, bottle caps, straws

Question 4

Polyethylene (PE): High density (HPDE) and low density (LDPE) (thermo)

Answer 4

HPDE: detergent and shampoo bottles
LPDE: plastic wrap

Question 5

High impact polystrene (HIPS) (thermo)

Answer 5

easy to machine and shape, impact resistant, packaging, disposable cutlery

Question 6

acrylonitrile butadiene styrene (ABS) (thermo)

Answer 6

low cost, heat resistant, dimensional stability, legos

Question 7

Polyethylene terephthalate (PET) (thermo)

Answer 7

light weight, shatter resistant. used for: water bottles, consumer product containers, make-up containers

Question 8

Urea-formaldehyde (thermoset)

Answer 8

electrical cases, high-heat contexts. High tensile strength

Question 9

Polyurethane (PU) (thermoset)

Answer 9

Wheels and castors. High abrasion resistance

Question 10

Melamine Resin (thermoset)

Answer 10

kitchen worktops, kitchenware

Question 11

Epoxy resin (thermoset)

Answer 11

general purpose adhesive. tough, high compressive strength