Polymers

Question 1

Thermoplastic

Answer 1

Can be reshaped and reheated
Extreme heat turns it into liquid
softened when heated
recycable
made with long polymer chains with few cross links

Question 2

Thermosetting Plastic

Answer 2

Set by heat by a chemical reaction
Can’t be reshaped
Polymer chains which have cross links in between
Strong and durable
Often used for powder and liquid resign forms
Thermosetting platsic polymers can be flexible

Question 3

What is thermoplatsic examples

Answer 3

pan handles and kitchen benchers

Question 4

What process do we use for shaping our objects

Answer 4

Vaccum forming

Question 5

How to turn a monomer to a polymer

Answer 5

process called steam cracking, takes place around 800 degrees

Question 6

What are the long interconnected lines in thermosetting plastic

Answer 6

Bonds

Question 7

What are the more connected lines called in thermoplastic

Answer 7

It makes the structure stronger and are called polymer chains

Question 8

What happens when the thermosetting plastic are heated

Answer 8

The additional cross-links prevent the molecules moving

Question 9

Why is it important to put labels on plastic containers

Answer 9

To recycle the right type of plastic

Question 10

Why is plastic washed before it is recycled

Answer 10

So that the plastic can be recycled into new material

Question 11

Plastic is melted before it is shredded down. Why?

Answer 11

It makes it easier to be broken down because the polymer chains are partialy broken down which reduces the tensile strength

Question 12

What is natural polymer

Answer 12

Natural source of polymer is extracted

Question 13

3 natural polymers

Answer 13

Amber
Biteuman
Rubber

Question 14

3 man made polymers

Answer 14

Acrylic
Nylon
Polythene

Question 15

What is injection moulding

Answer 15

Manufactoring process for making parts by injecting material into a mould

Question 16

Extrusion

Answer 16

Extrusion happens when you appy a force which pushes a material out of the syringe.

Question 17

Diagram of Extrusion

Answer 17

Place the plastic powder into the funnel which travels towards the steel die and softens it because of the heat. Motor is the big thing at the right hand side

Question 18

Injection Moulding

Answer 18

Injection moulding is the process of melting plastic pellets which are injected at pressure into a mould

Question 19

Diagram of Injection moulding

Answer 19

The material comes out and goes to the platen which forces the two polymers together

Question 20

Rotational moulding

Answer 20

Rotational moulding heats a hollow mould which is filled with shot weight of material. Then it is rotated causing the materials to stick to the walls of the mould

Question 21

Diagram of Rotational moulding

Answer 21

Fill the funnel with polymer powder
Then heat it
then let it cool down
then let it rotate which lets the two polymers merge and sticks to the walls of the mould

Question 22

Blow moulding

Answer 22

Forming and joining hollow plastic parts Glass bottles for example

Question 23

Blow moulding diagram

Answer 23

The heated material then goes through the slot and goes through the blow pin which squishes the material to form the hollow plastic parts