Please enable JavaScript.
Coggle requires JavaScript to display documents.
Plastics, Strength, elasticity, rigidity and flexibtflty are…
Plastics
Origin of plastics
Natural plastics are obtained directly from raw vegetable materials. For example: 
Synthetic plastics are made from compounds extrated from petroleum, natural gas and carbon. The majority of plastics belong to this group.
-
-
-
Strength, elasticity, rigidity and flexibtflty are charactenstics of many plasucs, although they vary from one type to another.
Mechanical: malleabrlity, ductility, mechanical resistance.
Acoustic: acoustic insulation.
Electrical: electrical insulation
Thermal: thermal insulation.
Other properties: low density, impermeability
-
Properties of plastics
-
Ecological properties
Chermical recycling. We apply chemical processes to make new
materials from the original components of plastic residues.
Energetic recycling. We can incinerate plastics and the energy that
is produced is used tn industry, for heating or producing electncity.
-
-
Thermoplastics
They' re made up of weakly formed molecular chains.
-
When we heat them, they become soft, which allows them to be formed into different shapes. The heating and cooling process
can be repeated many times.
Thermostable plastics
-
They are formed by strongly-linked
chams runmng in different directions
When heated, they become soft and can be shaped. When cooled, they cannot be remoulded by applying heat.
-
-