![]() ![]() At the end of the cross-linking reaction, allow the flask to cool and collect the product by scrapping it from the flask with a spatula. The longer the reaction time, the better your product should be. If you’d like to save some you can choose to play with just 1/4 to 1/2 of the batch, and seal the rest up in a really airtight container for future sensory play. Heat the mixture using a 180 o C oil bath for 1.5-2.5 hours. This homemade silly putty recipe is not one that you save to play with again, as it does begin to dry out after an hour or so. You may get food dye on your hands but we found that the soap and oil in the homemade silly putty recipe help make the color easy to wash off with soap and water. Once everything is mixed as well as possible with the fork (or spatula), start kneading the putty with your hands until it is smooth and evenly colored. Then mix everything as well as you can with your fork or spatula. If you would like to dye your homemade silly putty recipe, add in a few drops of food coloring. ![]() You can also use a cooking oil like avocado oil or canola oil. The putty won’t form together just by mixing, and that’s okay.Īdd about a tablespoon of baby oil. ![]() You can use a fork, or a small silicone spatula. So in this case about 1/2 cup.īegin mixing the cornstarch and dish soap together. Next you need to add half the amount of dish soap. I let her just dump cornstarch in and eyeballed the amounts. If you want to measure you can use one cup of cornstarch for this larger batch silly putty recipe. Start by dumping cornstarch into a large bowl. We use Johnson and Johnson but any brand will work. Buy Neon Food Dye on AmazonīABY OIL – We really only use baby oil for projects like this and our kinetic sand. Store the homemade silly putty in a zip top baggie.FOOD COLORING – We used this neon purple for Larkin’s silly putty recipe. Stir with a spoon and then knead with hands as the mixture thickens.Pour the borax mixture into the glue and water.Mix 1 teaspoon borax with ½ cup warm water in the measuring cup.Pour the water into the mixing bowl and stir until smooth. Fill the empty glue bottle with water and shake the bottle. Empty the bottle of glue into the mixing bowl.You can make your own Silly Putty at home-or at least something similar. Bounce the ball on the same surface and from the same height as before and note how high it bounces.ĭoes temperature affect how high the Silly Putty ball bounces?.Put that same ball into the freezer for an hour.Roll Silly Putty into a ball and bounce it on a flat surface.Do this easy experiment to see how temperature changes how the Silly Putty ball bounces. The properties of Silly Putty change with the temperature. When Silly Putty is rolled into a ball, it bounces when dropped on a smooth surface just like a rubber ball. However, when the putty is pulled apart rapidly, the hydrogen bonds break apart abruptly and the putty breaks. When the Silly Putty is stretched carefully, the hydrogen bonds break apart slowly and allow the putty to hold together. These bonds make the Silly Putty easy to roll into a ball and stick to itself. Silly Putty is made of polymers, or long chains of molecules, that are cross-linked by weak hydrogen bonds. It wasn’t until it was packaged in Easter eggs for the upcoming holiday and marketed as a children’s toy, Silly Putty, that the popularity of this accidental material took off. Scientists tried to discover a practical application for this new substance, but could not. It could bounce, stretch, break, and flow. This new polymer was a non-newtonian fluid, meaning that it acted as both a viscous liquid and an elastic solid. Measure out 10 cm 3 of borax solution into the beaker and add this to the polyvinyl alcohol solution, stirring vigorously until gelling is complete. If supplied, add one drop of food colour or fluorescein dye to the solution. The result was a new polymer with some peculiar properties. Place 40 cm 3 of the polyvinyl alcohol solution in the plastic cup. One of those engineers accidentally dropped boric acid into silicone oil. Silly Putty Historyĭuring WWII, there was a rubber shortage, so scientists and engineers were hard at work trying to create new polymers and substances that could take the place of rubber. Silly Putty is one of those classic toys that never gets old.
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