Viscosity is the “thickness” of a liquid, or its resistance to flow. Putty is a Non-Newtonian substance, which means that it doesn’t follow the theory of viscosity that Newton observed. ![]() Mix up some “quicksand” with cornstarch and waterĮveryone loves playing with a little silly putty, but Thinking Putty is even better! It’s the ultimate putty that can stretch, squish, tear, smash, bounce, make noise, and change color.Įven if you don’t have some, you can see it in action with our Thinking Putty video.Use glue and borax to make a colorful bouncy ball.Make glue and slime from milk in these polymer & slime experiments.Your slime will last for a while if you seal it in a plastic bag and keep it in the fridge. (The partial positive charge of hydrogen atoms attracts the partial negative charge of oxygen atoms.) Since hydrogen bonds are weak, they can break and reform as you play with the slime or let it ooze on a flat surface. It does this linking job when the borax molecules form hydrogen bonds with molecules present in the PVA chains. (The term polymer comes from the words for “many parts.”) The borax acts as a “cross-linker,” linking the individual PVA chains to each other so they connect to form a blob of slime. While water is a liquid made up of individual H 2O molecules, polyvinyl alcohol is formed of long chains of connected molecules, making it a liquid polymer. Zip the bag and knead it until the chemicals are mixed into slime. Pour the cooled PVA solution into a ziplock bag and add 2 teaspoons (10ml) of the borax solution.Ĥ. Make a 4% borax solution by stirring a little less than 2 teaspoons (approx. You can add food coloring if you want colored slime. A slight film may have formed on top you can remove that with a spoon. Cover the bowl and microwave for 1 minute, then stir. 4g) of PVA into 1/2 cup (approx 100 ml) of water in a large microwave-safe bowl. ![]() Make a 4% solution of polyvinyl alcohol: Stir 1.5 teaspoons (approx.
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