Polymers

Question 1

What are thermo polymers

Answer 1

Polymers that can be shaped with heat

Question 2

What are thermo setting polymers

Answer 2

Polymers that can set with heat, but cannot be reheated and reshaped

Question 3

Talk about polystyerene

Answer 3

Known as PS
80
Stiff, hard and brittle
Common uses are disposeable cups and construction kits

Question 4

Talk about low density polyethylene

Answer 4

tough
chem rsitatnt
water proof
low leevl of rigidty
squeezy botles, bin liners

Question 5

Talk about high density polyethelene

Answer 5

Known as HDPE
Fairly stiff and hard,
used for domestic bleache bottles and milk crates, etc

Question 6

Talk about polymethyl methacrylate

Answer 6

Also known as PPMA or acrylic
95
it is crystal clear and glossy,
Can be used as a replacement of glass

Question 7

Talk about Polypropelene

Answer 7

Also known as PP
100,
Stiff, hard, flexible when thin
very commonly used plastic
Can be used for things like plastic furniture
good fatigue ristant

Question 8

Talk about polyvinyl chloride

Answer 8

PVC
95
Available in rigid and flexible forms
Stiff, impact and chemical restance
used for things like piping and electrical aplliances

Question 9

Talk about polyethelene terephtalate

Answer 9

good impact reistance
Also know as PET
it is quite translucent and hard,
good for things such as water bottles etc

Question 10

Talk about Acrylonitre-butadine-styrene

Answer 10

Known as ABS
80
Opaque, stiff, hard, impact resitance
It is useful for products that are impacted by weight and impact
Used on hoovers

Question 11

What are the two forms of PVC

Answer 11

Rigid and unplasticised (Wire casing, hosepipes|)
Plasticised (window frames)

Question 12

What are the 3 types of Polystyrene

Answer 12

General purpose polystyrene
High impact PS
Expanded polystyrene

Question 13

Give some uses of GPPS and why

Answer 13

Toys and packaging
Hard
Rigid
Low shrinkage

Question 14

Give some uses of HIPS and why

Answer 14

High impact PS
Used in low strength structure
Used when low costs are needed
used for single use drink cups, tolet seats

Question 15

Give some use of EPS, and why

Answer 15

EPS would be used to protect delicate items, it is made of 98% air, making it very light - it is used in things such as styrofoam moddeling.

Question 16

Talk more about acrylic

Answer 16

Also known as perspex
It is tougher than glass
Can easily be moulded
They are very translucent
Good chemical reistance and UV etc

Question 17

Talk about polyamide

Answer 17

Also known as PA
In wools and silks
Can be made into things such as nylon
Very high melting point

Question 18

Talk about urea formaldehyde

Answer 18

Sets rigid and hard in water

Electrical fittings

Question 19

Talk about phenol formaldehyde

Answer 19

Also known as PF
Mid high melting point
Opaque and dark
Iron and sauce pan handles

Question 20

Talk about melamine formalhyde

Answer 20

Also known as MF
Mid High melting point
It is opaque and multicoloureds
Plastic cups and plates

Question 21

Talk about epoxy resin (high melting point)

Answer 21

Very high melting point
A resin in two tubes
Once formed it is very hard to deform
Used for potting of electronic surfaces

Question 22

Talk about low melting point ER

Answer 22

Low MP
it has one activator tube
Used as an adhesive

Question 23

Talk about epoxy resin

Answer 23

High mechanical properties
Chemical resistanceI
Hard wearing and durable finish
Can be used for joining metals.
Insulator

Question 24

Talk about PS resin

Answer 24

Brittle
Easy handling
Low cost,
Stability
Range of resitance
used for ly up proecess of GRP

Question 25

uPVC

Answer 25

rigid, opaque, tought, good weatehr resitance
use on window frames, water pipes

Question 26

Flexible PVC

Answer 26

translucent
tough
good weather and chem reistsnce
used for hoses and shti