Kevin's+Silly+Putty

Silly Putty

Materials: Cups Spoons Water Glue Borax Food Coloring

Procedure: 1. Mix 4 teaspoons of glue with 1 tablespoon of water in the first cup. You can also add food coloring to this one 2. Add one teaspoon of Borax solution and stir continuously 3. Take the Silly Putty out of the cup and play with it until the excess liquid is absorbed

Explanationy Stuff and Pretty Much What I'm Planning to Say While Presenting:  Who here has ever owned Silly Putty? Today we are going to make our own silly putty. Silly Putty acts as a viscous liquid and an elastic solid. It is an elastic solid in that it stretches when pulled, and it is a viscous liquid because it keeps its shape for a while. If you do not know what viscosity is, it is how thick a liquid is. For example, water is not very viscous while honey is. Silly Putty is composed of polymers connected by things called hydrogen bonds. These bonds can be easily broken, and that is why Silly Putty snaps when you pull it hard. Silly Putty is able to bounce, stretch, melt into a puddle, and even copy newspaper and comics.

Silly Putty was made in the Forties by scientists trying to create a new inexpensive rubber to support the war. This rubber was later sold as a child's toy. We are now going to make that toy. There should be two cups in front of you. One has a milky solution in it, which is glue and water. The other is a cloudy solution, which is Borax detergent and water. If you want to have colored Silly Putty now's the time to add food coloring to the milky solution. After adding food add the some of the cloudy solution to the cup and mix continuously until there is a large glop of silly putty. Take it out of the cup, it will be wet. After playing with it in your hands for a bit the wetness will go away. And now you have your own silly putty!

Practical Aplications: It is a kids toy. It was originally made for an inexpensive rubber to support the war. It is also used for hand injury rehabilitation.

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