Plastics by the Numbers

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Presentation transcript:

Plastics by the Numbers Recycling plastics, types of plastics, and the sorting of plastics

One Word: Plastics What comes to your mind when you hear the word plastic? How often do you use plastic water or soda bottles? http://www.youtube.com/watch?v=5-wq9ZCQp4U

How many types of plastics are there?

Plastics by the Numbers Work in pairs with equipment at work station SAFETY! Acetone is FLAMABLE! Keep away from the hot plate Wear safety goggles at ALL times Wear gloves when handling acetone Wash hands after handing acetone Keep distance when boiling water Don’t drink ANYTHING

After the Lab After you and your partner have completed the last table in the lab: 1. Clean up station Dispose of plastic and oil in garbage Dispose of water and acetone in drain 2. Get started on worksheet until all groups are done (Will be homework if not completed in class)

After-Lab Discussion Which test did most of you decide to do first? Why? Least amount of steps? How might the properties of these plastics affect their uses or safety?

Diverse Properties Properties affect the use and safety of each plastic type Plastics to avoid: Polyvinyl chloride (PVC) considered the most damaging of all plastics releases carcinogenic dioxins into environment when manufactured Polystyrene (PS) can leach styrene, a possible human carcinogen

Safer Plastics! PET, or polyethylene terephthalate -considered among the safest plastics -but still not safe to use for water bottles! High-Density Polyethylene (HDPE) Used in some reusable sports bottles, but still leak some chemicals! WHAT DO YOU THINK THE BEST CHOICE FOR A WATER BOTTLE IS?

What can plastics be recycled into?

How are plastics sorted before recycling? Still no good way other than manually Till the end of the class period, work on a classification key with you partner to give to the workers at the recycling facility that would help them to easily classify unmarked plastics. You can work on it together, but make sure you are doing your own! Keep in mind the characteristics of a good classification key that we talked about earlier! Use the paper provided Will be due, with the worksheet, at the beginning of class on Monday Extra credit: Type a paragraph about a new technique or invention that are currently being implemented to aid in the SORTING of plastics