What type of polymer is slime
The French pair beat the English chemist Humphrey Davy to it by just nine days. Boron B is named after one of its compounds, borax, which had been used as a glazing agent for hundreds of years. Connect your curriculum teaching on materials to engaging sustainability contexts.
This topic web suggests classroom activities linked to sorting plastics for recycling and melting plastics for new uses. Use this practical to investigate how solutions of the halogens inhibit the growth of bacteria and which is most effective.
Site powered by Webvision Cloud. Skip to main content Skip to navigation. Five out of five 1 Comment. In each case, heat the mixture gently, stirring occasionally, until the solution clears. Avoid boiling the solution. After cooling, this solution can be poured into suitable smaller containers, which can then be sealed and stored indefinitely. Borax, hydrated sodium tetraborate, Na 2 B 4 O 7. The solid and solutions in excess of 8.
Borax solutions as prepared following these instructions do NOT require a hazard label. BUT technicians preparing the solutions need to be alerted to the hazard. Pregnant women should avoid handling the solid. Students may want to take the slime home — this should not be allowed. Best supplied in small glass bottles fitted with teat pipettes.
Making slime is a favorite activity for scientists of all ages! Carolina Biological. How to Make Slime. Carolina Staff Sep 30, , AM. Buy a slime kit. Safety and teacher tips Even though PVA slime is non-toxic, have students wash their hands after handling slime.
Do not eat slime. Slime residue can be removed using warm water, but it may be difficult to remove from carpet. Slime basics Slime is a type of polymer, which is a large molecule formed by many repeating units of smaller molecules. As the name suggests, poly vinyl alcohol is made of many units of the monomer vinyl alcohol.
Slime polymerization Carolina Biological. Add 2 to 3 drops of food coloring to the plastic bag optional. Magnetic Slime Oozy, gooey, sticky, and fun, the creation of magnetic slime is a good way to get your students interested in polymers and magnetism. Magnetism Magnetism is the ability of a material to attract iron and produce a magnetic field. Magnetic lines of force Carolina Biological.
Unmagnetized material left and magnetized material right Carolina Biological. Materials for magnetic slime per group Sodium Borate borax , 0. Place 15 mL of water in 1 of the 2 plastic cups. In a separate cup, place 40 mL of PVA.
Pour the borax solution into the PVA mixture. Pick up the slime and mix it with your hands, then place it in a large weigh boat. For example, divide students into 5 groups. Have one group add 2 ml of borax to ml of PVOH solution. The others groups should add 4, 8, 12, and 20 ml of borax to the ml of polymer solution, respectively. This should more easily demonstrate the effects of crosslinking on the properties of the polymer. Using more sodium borate results in more crosslinking.
Students can stretch or roll the slime into long ropes and determine which slime which amount of crosslinking is best for this. For high school chemistry classes, refer to the article Casassa, E. Polyvinyl Alcohol Slime In this experiment, a polymer polyvinyl alcohol chemically reacts with borax to form a crosslinked polymer network.
Supplies needed: Polyvinyl alcohol solution instructions for preparation included below Borax solution instructions for preparation included below Small 3 oz cup Plastic teaspoon Wooden stick Waxed paper Procedure: 1. When a substance keeps its volume but loses its form when left alone, scientists call it a liquid.
Cleanup Do not pour glue solutions or slime down a drain because they can form clogs. Instead, throw them away in the garbage. Wash all equipment with soapy water. More to explore It's a Solid It's a Liquid It's Oobleck! This activity brought to you in partnership with Science Buddies. Already a subscriber? Sign in. Thanks for reading Scientific American. Create your free account or Sign in to continue. See Subscription Options. Discover World-Changing Science. Materials Container Elmer's glue or other polyvinyl acetate PVA glue Hot water Stirring rod or plastic spoon Borax Measuring spoon one half tablespoon Measuring cups one half and one quarter cups Goggles or eye protection handling borax can irritate eyes A work space and work clothing that is protected and won't be damaged if sticky slime gets on it Adult helper Food coloring or marker optional Ziplock bag or airtight container to store your slime optional Preparation Protect your work space and clothing—slime can be sticky and hard to remove!
Put on goggles or glasses, as the borax solution can irritate the eyes. Have an adult helper stir one half tablespoon of borax powder into one half cup of lukewarm water in a cup. Stir well until the solution looks clear, label the container "2 percent borax solution," and set aside. Procedure Pour one half cup of glue and one quarter cup of warm water in a container. Optional: If you like colored slime, you can mix in a few drops of food coloring.
Another option is to put the tip of a marker into the water for a short time so the ink dissolves in the water. Stir with the stirring rod. After some stirring, you should see a substance sticking to your stirrer.
Does the sticky substance look like a solid or like a liquid—or can you not tell yet? Collect the sticky substance in your hands and work it with your hands for about one minute.