polymers

Question 1

what are the 3 types of polymers

Answer 1

thermoplastics
thermosetting plastics
elastomers

Question 2

thermoset plastics

Answer 2

Urea formaldehyde
melamine formaldehyde
polyester resin
epoxy resin

Question 3

thermo plastics

Answer 3

low density polyethylene LDPE
high density polyethylene HDPE
polypropylene PP
high impact polystyrene HIPS
acrylonitrile butadiene styrene ABS
polymethyl-methacrylate PMMA
nylon
rigid polyvinyl chloride uPVC
flexible polyvinyl chloride PVC

Question 4

Elastomers

Answer 4

natural rubber
butadiene rubber
neoprene
silicone

Question 5

natural rubber

Answer 5

high tensile strength, good hardness, is tough and an electrical insulator, also good cold res

uses - tubes and hoses

Question 6

Butadiene rubber

Answer 6

tough, excellent wear res, good thermal res against friction, is an electrical insulator

uses - vehicle tyres and conveyor belts

Question 7

neoprene

Answer 7

good thermal, oil and chemical res, excellent weather res, tough, good abvrasion res and is an electrical insulator

uses - laptop cases andhose covers

Question 8

silicone

Answer 8

good flexibility at low temps, good thermal and weather res and is a electrical conductor

uses - bakeware and machinery lubricants

Question 9

Urea formaldehyde

Answer 9

hard and brittle, heat res and a good electrical insulator

uses - electrical fittings and adhesives

Question 10

Melamine formaldehyde

Answer 10

hard and tough, heat and chemical res making it food safe

uses - buttons, decorative laminates

Question 11

polyester resin

Answer 11

heat and chemical res, brittle and rigid

uses - castings and car parts

Question 12

epoxy resin

Answer 12

chemical res, is hard and tough, clear and rigid

uses - adhesives, and surface coatings

Question 13

LDPE

Answer 13

weather proof and has good chemical res, is also very tough

uses - toys, carrier bags and general packaging

Question 14

HDPE

Answer 14

weatherproof and is good chemical res, is tough

uses - jerry cans, toys

Question 15

PP

Answer 15

good chemical and fatigue res, is tough

uses - rope, food containers

Question 16

HIPS

Answer 16

is hard and tough, is rigid

uses - drink cups and yoghurt pots

Question 17

ABS

Answer 17

extremely tough and is hard

uses - handles and telephone handsets

Question 18

PMMA

Answer 18

is tough and hard and has a good chemical res

uses - car light casings

Question 19

Nylon

Answer 19

tough and is corrosion res and has a good temp res

uses bearing and gears

Question 20

uPVC

Answer 20

rigid, opaque is hard and tough, good weathering and chemical res and is fire retardant

uses - window frames

Question 21

PVC

Answer 21

can be translucent, is tough and flexible, has good weathering and chemical res

uses - hose pipes