composition of plastics plastics tech 1. composition of plastics lesson essential question: what are...

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 Recycling