New Materials and polymers

Question 0

What can shape memory alloys be used for?

Answer 0

1) Glasses frames

2) Braces

Question 1

What is Nitinol?

Answer 1

Shape Memory Alloy

Question 2

What size are nano particles?

Answer 2

1-100 nm

Question 3

What do nano particles include?

Answer 3

Fullerenes (Hollow Balls)

Question 4

What are nanotubes?

Answer 4

Tiny hollow carbon tubes. Strong covalent bonds.

Question 5

Name 4 uses of nano materials…

Answer 5

1) Industrial Catalysts
2) Specific Sensors
3) Stronger, lighter building materials
4) Cosmetics - No marks
5) Nanomedicine -Fullerenes more easily absorbed
6) Lubricant
7) Conduct in electric circuits

Question 6

Describe Thermosoftening Polymers…

Answer 6

1) No Cross-Linking
2) Easily Overcome weak intermolecular forces and melt
3) Can be remoulded
4) Free to slide over each other

Question 7

Describe Thermosetting polymers…

Answer 7

1) Crosslinking holding chains in solid Structure
2) Strong intermolecular forces
3) Doesn’t soften
4) Strong, Hard and Rigid

Question 8

What affects the properties of a polymer?

Answer 8

1) Low Density - Ethene 200 degrees
- High Pressure
- Flexible
- Bags and Bottles
2) High Density - Lower Temperature and Pressure (+Catalyst)
- Drainpipes

Question 9

Nanoparticles have a…

Answer 9

Large surface area to volume.