Balloon Shish Kebab
Students discover a cool characteristic of polymers that contributes to a balloon's elasticity.
The rubber at the nubbin and at the tie is looser and less fragile than around the circumference of the balloon, where the polymers are already stretched to their limit. When the skewer slides into the loose rubber, the polymers will stretch around the skewer allowing the balloon to stay inflated. A needle through the side of a balloon will cause the rubber to tear and pop easily since the polymers are already stretched.
Students will be able to:
- Explain how a balloon's chemical structure gives it its elasticity.
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