Polyvinyl Alcohol Slime - Gelfand Center - Carnegie Mellon University
Strain Hardening Behavior of Poly(vinyl alcohol)/Borate Hydrogels Clarification of Cross-Linkage Structure in Boric Acid Doped Poly(vinyl alcohol) with Partially Hydrolyzed Poly(vinyl acetate)-Borate Networks: Applications to Cleaning. water at 70 oC; do not boil) and a 4% solution of borax (4 g The viscosity of the gel can be altered by changing the ratio of PVA:borax. 3. The gel formed can. There are a number of uses of the PVA polymer we are studying: ml/group of poly (vinyl alcohol) 4%; 10 ml of sodium borate 4%; Styrofoam cups and.
The resulting solution is ready for use. Sodium tetraborate decahydrate is mixed at a 4 per cent concentration in water. Measure out 4g of sodium tetraborate decahydrate and dissolve in 96g of water.
In a beaker mix 50cm3 4 per cent poly ethenol with 10cm3 4 per cent sodium tetraborate decahydrate, and stir well with a glass rod. After a few minutes a gel is formed which can be lifted out with the glass rod. Repeat with different volume ratios to investigate the amount of cross-linking. Safety Wear safety glasses and rubber gloves at all times.
There are no hazards associated with the poly ethenol.
A crossed-link polymer | Exhibition chemistry | Education in Chemistry
Sodium tetraborate decahydrate is toxic by ingestion. Take care to keep the chemicals and the polymer away from clothes because they may produce permanent stains. Special tips Any volume of the two liquids can be mixed but start with a 5: Food colouring can be added to poly ethenol in the beaker to make different colours. This colouring should be added before any of the sodium tetraborate decahydrate solution has been added, or it can be added directly to this solution.
A crossed-link polymer
Reaction of PVA with borax Teaching goals Gases and liquids are classified as fluids because both can flow and change their shapes. Sir Isaac Newton's Law of Viscosity states that only a change in temperature affects the viscosity of a fluid.
Newton, however, had never seen the polymer produced by this experiment. Filler also reduces the cost of the product since the filler materials are generally inexpensive.
PVA polymer slime- Learn Chemistry
The addition of glitter or confetti to the polymer solution makes a very attractive slime! Put your slime in the refrigerator or freezer to cool it below room temperature.NO GLUE SLIME! 💦 Testing DISH SOAP Slime Recipes
Be sure it is in a plastic bag or wrapped in plastic wrap so it won't dry out. How do the properties of the polymer change with temperature?
- Experiment 2
Do plastics behave differently outdoors in freezing weather compared to indoors at room temperature? For a more elaborate experiment, have different groups of students use different amounts of sodium borate. 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. Heat gently for several hours until dissolved solution turns clear. Make sure the solution does not boil, or the properties will be altered. Dilute to 1 liter with more water.
The prepared solution should be clear and somewhat viscous. It stores well in the refrigerator until needed. You can obtain Borax at the grocery store near the laundry detergent.