PLASTICS

Plastics are versatile and flexible materials .
All plastics are based on polymers and they are created by bonding molecules together.
The terms monomer and polymer are very important in the plastics industry. A monomer is a relatively small molecule that can chemically bond to other monomers, forming a polymer. Remember, all plastics are polymers.

There are different types of plastic:

Thermosettings plastics
Once 'set' these plastics cannot be reheated to soften, shape and mould. The bond between the molecules is very strong.

Thermoplastics
These plastics can be re-heated and therefore shaped in various ways. They become mouldable after reheating. Reheating and shaping can be repeated. The bond between the molecules is weak These types of plastics can be recycled.


1.- Read the text, looking for the meaning of those words you do not understand.
2.- Write down this vocabulary in your notebook