• petroleum jelly
• a sharp pin
• cellophane tape
Apply vaseline(petroleum jelly) to the sharp pin inorder to make it smooth.
Now inflate a balloon not too much.
Stick a strip of cellophane tape to the side of the balloon.
Now for grand event.
Take your pin and push to the side of the balloon with the cellophane tape attached to it.
You can see it will not pop.
The rubber in the balloon consists of many long molecules that are linked together. It's similar to the way all of the noodles in a plate of spaghetti stick together. These long molecules are called polymers; when molecules of a polymer are chemically attached to each other, it is called cross-linking. These links hold the polymer molecules together and allow them to stretch…up to a point. When the force or tension pulling on the cross-links is too great, they will break, and the polymer will pull apart. The tape sticks to the rubber in the balloon and will not allow the rubber to stretch to the breaking point when the pin pierces the balloon. In other words, the tape reinforces the cross links, and the balloon stays together.
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