Section 3: Polymers and Plastics Show plastic to clothing video

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Presentation transcript:

Section 3: Polymers and Plastics Show plastic to clothing video Q: What would plastic look like at the atomic level?

Polymer: A large chain like molecule that is built from smaller units Polymer: A large chain like molecule that is built from smaller units. Monomer: Smallest unit from which polymers form. Macromolecule – huge molecule with a molecular weight of almost 50,000 g/mol Natural Polymers: exist in nature (proteins, carbohydrates, and nucleic acids) Synthetic Polymers: Man made.

Formation of Polymers (do not write)

Ways Polymers form: High density polyethylene (HDPE) Addition polymer: A polymer formed when unsaturated hydrocarbons (double and triple bonded) bond end to end. Example: Polyethylene is made out of tons of ethylene joined together. High density polyethylene (HDPE) (used for most house hold products) Low density polyethylene (LDPE) (used mainly in bagging)

Condensation polymers: Are formed when a water or other molecule is released during the formation of a polymer. Example (polyester and nylon) Ex) Nylon, Polyester, Kevlar and acrylic

Types of Synthetic Plastics: Thermoplastics Thermoset Polymer chains can slide past each other and can be reformed when heated Polymers are cross linked and the material will not melt when heated.

Vulcanization: When sulfur is infused in rubber to create strong cross linking between the rubber polymer chains.

Natural Polymers Starch: Repeating structures of glucose sugars. These are digestible by animals. Cellulose: Repeating structures of glucose. Only digestible by a few animals and it is what plants are made from.

Proteins: These are made from repeating amino acids Nucleic Acid: RNA and DNA are used for the production of proteins and growth of the cell.

Optional Reading activity: pg 264 1) What breaks down plastics? 2) What type of functional group breaks down easily? Why are biodegradable plastic bags so important? 4) Why is polyethylene so stable?

Thank you for attending POLYMERS

Warm-up: What is a polymer? What are the monomers of protein? Why is carbon necessary for life? What is the difference between starch and cellulose?

Additional Videos Recycling: http://www.cleanvideosearch.com/media/action/yt/watch?v ideoId=g89MvIOYc58 Plastic Bottles to clothes: http://www.cleanvideosearch.com/media/action/yt/watch?v ideoId=zyF9MxlcItw