Recently bought a tube of super glue to fix something, and I started wondering how it stays a liquid inside of the tube/bottle and doesn’t just stick to the sides?
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SuperGlue is a name brand of [CyanoAcrylate (CA) glue](https://en.wikipedia.org/wiki/Cyanoacrylate). It’s basically a bunch of chain links floating as a liquid, but as soon as they touch certain chemicals (usually water) the chain links combine into long chains that hold together.
So they don’t ‘dry’ or ‘stick’ inside the tube because they don’t have the specific trigger to turn into long chains. It’s not until they touch water (such as humidity) that they cure into a hard, stuck together plastic.
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