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A solution of polyvinyl alcohol (PVA) can be made into a slime by adding borax solution, which creates cross-links between polymer chains. This experiment is easy to set up, providing the chemicals are available, and should take no more than about 30 minutes. It can be done by students in groups of two or three.
Procedure: 1. Measure 2 tsp. of polyvinyl alcohol polymer solution into a cup. 2. Add 1/4 teaspoon of Borax solution. Mix well with a wooden stick. 3. Touch and try to pour the product. How does it feel? Can it be poured? 4. Working on waxed paper, roll the "slime" into a ball and try to bounce it. Does it bounce?
Obtain 20 mL of 4% polyvinyl alcohol solution in a paper cup and a stirring rod. Examine the solution. Does it have any odor? Is it sticky? What happens when a small amount dries on your fingers? If desired, one or two drops of food color can be added to the polyvinyl alcohol solution. Stir the mixture. Measure 5 mL of 4% borax solution.
Prepare your materials. Step 1: Dissolve the Polyvinylalcohol in water and make a 4% solution. In a steel or aluminum saucepan add 1250 ml water (5 of the blue measuring cup). Add the entire 50 grams polyvinylalcohol to the saucepann.
This slime recipe requires a 4% solution of polyvinyl alcohol (PVA) and sodium tetraborate (that’s Borax). Slime made with PVA is often referred to as commercial or “professional” slime. This is the type that is generally found in toy stores.
22 Απρ 2024 · At this point, add a few drops of food coloring (tartrazine) or fluorescein to the dissolution of alcohol, and mix both solutions. A slime forms quickly and can be stored in a plastic bag with self-closing mechanism to prevent drying.
Making PVA Solution. Add 30 g or 1 ounce of PVA powder to 500 ml or 16 fluid ounces of cold water in a bowl or double-boiler. Leave it for 1 hour to for the water to absorb the PVA. Put the bowl with this mixture into a saucepan with water or used the double-boiler.
