https://www.amazon.com/dp/B00BT5CV4I/?tag=pfamazon01-20berkeman said:
The clue is in the name: blowing up an elastic balloon deforms it elastically, which means it will tend to contract again when the pressure differential is removed.lily001 said:
The article explicitly states that the "valve" where you blow the air in stays open. As you said, the paper balloon deforms plastically, meaning it has no back-pressure that would deflate it.haruspex said:
One of the comments mentioned a Physics Today article, https://pubs.aip.org/physicstoday/a...5/Kamifusen-the-self-inflating-Japanese-paper.phinds said:
Just to mention that plastic deformation does not necessarily imply that there is no stretching involved.haruspex said:
Yes, I meant not stretched in a way that will lead to rebound. Well, not much.Orodruin said:
An elastic balloon is typically made from materials like latex or rubber, which allows it to stretch significantly when air is added. A paper balloon, on the other hand, is made from layers of paper and is much less flexible. The paper balloon can only expand to a limited extent before it tears, whereas the elastic balloon can expand much more due to its elastic properties.
When inflating an elastic balloon, you can continuously add air, and the balloon will expand as the material stretches. For a paper balloon, the process is different; you usually need to open it up gently and blow in air carefully to avoid tearing the paper. The paper balloon will take shape up to a certain point but won't stretch beyond its designed capacity.
An elastic balloon returns to its original shape after deflation because the rubber or latex material has elastic properties, allowing it to stretch and then return to its original form. A paper balloon, however, does not have elastic properties. Once it is inflated and then deflated, the paper may become creased or lose its original shape, and it cannot return to its initial form as effectively as an elastic balloon.
An elastic balloon is generally more prone to bursting because it can be stretched to a much larger size than its initial form, increasing the tension in the material. If overinflated, the material can no longer withstand the pressure and will burst. A paper balloon, while less flexible, is less likely to burst from overinflation because it cannot stretch much; it will simply tear if too much pressure is applied.
Elastic balloons, especially those made from synthetic materials like latex, can take a long time to decompose and may pose environmental hazards if not disposed of properly. They can be harmful to wildlife if ingested. Paper balloons, being made from biodegradable materials, are generally more environmentally friendly. However, they still require proper disposal to ensure they do not contribute to litter or pollution.