Composition of Plastics

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Properties of Polymers

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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

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

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

Types of Plastics

Types of Plastics

Plastics

Plastics Video Clips Polyethylene Bottles Plastic Bags Recycling to Clothing