Polymers

Question 1

What two groups are plastics divided into?

-Lucas M

Answer 1

Thermoplastics and thermosetting plastics

Question 2

What are thermoplastics made of?

-Lucas M

Answer 2

Long chain molecules

Question 3

What holds the long chain molecules together?

-Lucas M

Answer 3

Van de waals forces of attraction.

Question 4

Polythene and acrylic are examples of thermoplastics or thermosetting plastics?

-Lucas M

Answer 4

Thermoplastics

Question 5

What happens to thermoplastics when they are heated?

-Lucas M

Answer 5

They soften

Question 6

Name 2 of the 4 examples of Thermosetting Plastics?

• Humphrey Marsh

Answer 6

GRP
Bakelite
Phenol
Epoxy resin

Question 7

The process of injection moulding is controlled by what?

• Humphrey Marsh

Answer 7

A central processing unit in a CIM environment

Question 8

Moulds in injection moulding can be what?

• Humphrey Marsh

Answer 8

Complex and expensive

Question 9

The long chains of molecules in thermosetting plastics are held together by bonds known as what?

• Humphrey Marsh

Answer 9

Covalent bonds

Question 10

What type of plastics are flexible?

• Humphrey Marsh

Answer 10

Thermoplastics

Question 11

In school what can injection moulding be used to make?

-Ssnehnil G

Answer 11

A screwdriver

Question 12

Examples of Thermoplastics

-Ssnehnil G

Answer 12

Acrylic
Polythene
Polypropylene
PET
ABS
PVC

Question 13

Properties of Thermoplastics

-Ssnehnil G

Answer 13

Will soften when heated
Tend to be flexible (more or less)
Impact resistant
Can be coloured

Question 14

What are Thermosetting plastics made of?

-Ssnehnil G

Answer 14

Cross linked chains

Question 15

Do Thermoplastics have a One shot cycle or Continuous cycle?

-Ssnehnil G

Answer 15

Continuous cycle

Question 16

What can moulds be?

Ed H

Answer 16

Complex and expensive

Question 17

Moulding is what?

Ed H

Answer 17

Only suited to volume production

Question 18

What is now highly automated?

Ed H

Answer 18

Injection Moulding

Question 19

What do you feed an injection mould?

Ed H

Answer 19

Granules

Question 20

What Will soften when heated?

Ed H

Answer 20

Thermoplastic

Question 21

What is another name by which the bonds in thermosetting plastics are called excluding covalent bonding?

Caspar Tyser

Answer 21

Cross Linked Chains

Question 22

What plastics can only be formed once?

Caspar Tyser

Answer 22

Thermosetting Plastics

Question 23

Injection moulding is now controlled by a central processing unit in a …….. environment?

Caspar Tyser

Answer 23

CIM (Computer Integrated Manufacture)

Question 24

In ejection moulding where are the granules fed through into the barrel?

Caspar Tyser

Answer 24

The Hopper

Question 25

In injection Moulding moulds can be .........? Caspar Tyser

Answer 25

Complex and Expensive

Question 26

What is the force of attraction that hold the long chains of molecules together called? -Alfie Turner

Answer 26

Van Der Waals forces of attraction

Question 27

When do thermoplastics soften? | -Alfie Turner

Answer 27

When heated

Question 28

Why would you heat thermoplastics? | -Alfie Turner

Answer 28

To enable them to be reformed and moulded

Question 29

List the properties of thermoplastics: | -Alfie Turner

Answer 29

Will soften when heated, tend to be flexible, impact resistant and can be coloured

Question 30

Moulds can be complex and ... | -Alfie Turner

Answer 30

Expensive

Question 31

What does CIM stand for Oli Shaw

Answer 31

Computer integrated manufacture

Question 32

What process would you use to make wheelie bins Oli Shaw

Answer 32

Injection Moulding

Question 33

Phenol is an example of... Oli Shaw

Answer 33

A thermosetting plastic

Question 34

Cross linked chains may also be known as... Oli Shaw

Answer 34

Covalent Bonding

Question 35

How do thermoplastics react to heat Oli Shaw

Answer 35

They soften

Question 36

How do thermosetting plastics react to heat? | - Krystian Shanahan

Answer 36

Can withstand high temperatures without losing rigidity

Question 37

What are the properties of melamine? | - Krystian shanahan

Answer 37

Can be printed , heat resistant and can be coloured

Question 38

What is required to cause epoxy resin to set ? | - Krystian Shanahan

Answer 38

A hardener

Question 39

What property to thermosetting plastics lack? | - Krystian Shanahan

Answer 39

Plasticity

Question 40

Which type of plastics are used in compression moulding ? | -Krystian Shanahan

Answer 40

Thermoplastics