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Polymers
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Polymers—Demonstration Kits, continued
Fluorescent “Gummy Worm” Polymers—
Chemical Demonstration Kit
Glowing polymer worms! In this colorful demonstra-
tion, “gummy worm” polymers are synthesized from sodium alginate and three different dyes that fluoresce when exposed to ultraviolet light. As the glowing worms emerge from the solutions, students see what happens when long polymer chains are “tied together” by cross-linking. Your students will be captivated while learning more about polymers and fluorescence with this unforgettable demonstration. Includes detailed instructions and enough materials to perform the activity as written at least 25 times.
Concepts: Polymers, cross-linking, fluorescence.
Time Required: 15 minutes
Materials Provided: Calcium chloride, fluorescein, rhodamine B, sodium alginate, tonic water, forceps, jumbo pipets.
Note: An ultraviolet lamp is required and available separately.
The Wacky World of Superabsorbent Polymers—Chemical Demonstration Kit
By: Steve Spangler, Regis University, Denver, CO
Pour distilled water into an “empty” cup and the water solidifies into a gel. In another beaker add a small amount of powder, pour in distilled water and see an avalanche of fresh powdered “snow.” These remarkable sodium polyacrylate polymers have many water absorbing applications, including indoor artificial snow! Demonstration Notes included. Concepts: Polymers, osmosis, cross-linking.
Time Required: 10 minutes
Chemicals Provided: Sodium polyacrylate, PolySnowTM.
Water Marbles—
Chemical Demonstration Kit
By: The Flinn Staff
Explore the properties of superabsorbent polymers using water marbles. Amaze your students by “floating” a steel sphere on “water.” Since the water marbles have essentially the same refractive index as water, the steel sphere will appear to float on the surface of the water. Students will learn about the refractive index of water and the proper- ties of polyacrylamide spheres. Students can also calculate how much the spheres have “grown” and how the different refractive indexes of air and water illuminate or conceal the presence of spheres. A fun discrepant event demonstration!
Concepts: Superabsorbent polymers, index of refraction, discrepant event. Time Required: 15 minutes
Materials Provided: Water marbles, laser, steel sphere, and ruler.
See free video at flinnsci.com.
Balloon Needle Demonstration Kit
By: The Flinn Staff
Have you ever seen someone put a needle through a
balloon without the balloon popping? It can be done! We will tell you how and provide you with the proper type of needle and accessories to make you an expert. Detailed instructions and teaching tips are included. Concepts: Polymers.
Time Required: 10 minutes
Materials Provided: 22" needle, crocus cloth, emery cloth.
Note: Balloons are required and available separately.
Fluorescent “Gummy Worms” Polymers— Chemical Demonstration Kit AP7513
Catalog No.
Description
Price/Each
AP7513
Fluorescent “Gummy Worms” Polymers— Chemical Demonstration Kit
$33.15
AP9030
Ultraviolet Lamp, 18"
45.30
Catalog No.
Description
Price/Each
AP6303
The Wacky World of Superabsorbent Polymers— Chemical Demonstration Kit
$17.05
The Wacky World of Superabsorbent Polymers— Chemical Demonstration Kit
AP6303
Water Marbles—Chemical Demonstration Kit AP7429
Catalog No.
Description
Price/Each
AP7429
Water Marbles—Chemical Demonstration Kit
$21.40
Balloon Needle Demonstration Kit AP1969
Catalog No.
Description
Price/Each
AP1969
Balloon Needle Demonstration Kit
$21.55
POLYMERS—DEMONSTRATION KITS continued on next page.