Composition of Plastics Plastics Tech 1. Composition of Plastics Lesson Essential Question: What are plastics?

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Presentation transcript:

Composition of Plastics Plastics Tech 1

Composition of Plastics Lesson Essential Question: What are plastics?

Raw Materials in Plastic Resins Coal Air Water Petroleum Natural Gas Limestone

Production of Plastic Resins Chemists are responsible for producing synthetic resins Plastic is a forced combination of molecules Monomer - a simple molecule of synthetic resin. Polymer – a combination of monomers to form a long chain molecule.

Production of Plastic Resins

Polymerization - process of making plastic, linking of monomers to form polymers. Homopolymerization – combining of like monomers into polymers. Copolymerization – combining two or more different monomer units Autoclave - a piece of equipment that applies heat and pressure to combine monomers to form polymers.

Production of Plastic Resins

Types of Plastics Thermoplastic – plastic which can be reprocessed or reused. Thermosetting plastic– cannot be reused/reformed once heated. Definition of plastics – a synthetic substance made up of a long chain of complex molecules capable of being formed or molded into any desired shape.

Types of Plastics

Plastics

Plastics Video Clips Polyethylene Recycling