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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?
There are two methods for preparing a 4% aqueous solution of polyvinyl alcohol, the conventional heating method and the microwave heating method. The microwave method is much easier and less time consuming.
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. Pour the borax solution into the cup of polyvinyl alcohol and stir well. Describe what happens. Remove the material from the cup and knead it in your hand. The material will become firm and lose some of
There are two methods for preparing a 4% aqueous solution of polyvinyl alcohol, the conventional heating method and the microwave heating method. The microwave method is much easier and less time consuming. Flinn Scientific also sells 4% poly-vinyl alcohol solutions. Once the 4% polyvinyl alcohol solution is made it will last 6 to 8 weeks.
Assuming you are a teacher and can get hold of PVA (from ChemicalStore or ScienceKitStore), it is a fairly simple process to make slime. First, mix a 4% solution of PVA and water. 4 % would be 40 grams of PVA to 960 ml of distilled water (of course you can adjust and make more or less).
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.
