UNIT 3:PLASTICS AND TEXTILES.

1.PLACTIC MATERIALS:

KEY CONCEPTS:

• Plastics consists of long chains of atoms which are mostly composed of carbon.
• Plastics can be classified into natural and synthetic plastics.
• The process of manufacturing plastic is called polymerisation.
• Plastic materials are resistant,insulating(aganist electricity,heat and sound),ductile,malleble,impermeable and light.
• There are three types of plastic recycling precesses:chemical and mechanical recycling and energy recovery.