Materials

Question 1

What is a thermoplastic?

Answer 1

A thermoplastic has weak secondary bonds between its molecule chains. Therefore, they can be heated and reformed.

Question 2

What are thermoset plastics?

Answer 2

Thermoset plastics have strong primary bonds between their molecule chains. This means that it cannot be remolded once formed, and will burn if heated.

Question 3

Advantages of thermoplastics

Answer 3

Low production costs
Easily injected into molds
Ideal for uses requiring flexibility
Can be reshaped

Question 4

Advantages of thermosetting plastics

Answer 4

Heat-resistant and rigid
Ideal for uses that require strength and dimensional stability

Question 5

Where does softwood come from?

Answer 5

From coniferous trees (have cones and needle-like leaves)

Question 6

Properties of softwood

Answer 6

Low density, open grain (absorbent).
More flexible, less strong in tension.
Generally lighter colored, usually used for low-cost furniture.
Fast growing (renewable source).

Question 7

Where does hardwood come from?

Answer 7

Hardwood trees, with broad leaves and bear fruit.

Question 8

Properties of hardwood

Answer 8

More hardness and water resistance.
Stronger in tension and less flexible.
Smoother, consistent grain and wide rage of colors.
Slow growing, considered non-renewable.
Used for high quality furniture.