Rubber Bands Last Longer Refrigerated

That forgotten rubber band that snaps into a dozen brittle pieces hasn't just gotten old; it has undergone a chemical transformation. The remarkable elasticity of rubber comes from its structure of long, tangled polymer chains that can stretch and snap back into place. Over time, however, these chains are attacked by oxygen in the air. This process, known as oxidation, causes the polymer chains to break down or to form rigid, unwanted bonds with each other—a phenomenon called cross-linking. This molecular-level damage is what robs the rubber of its flexibility, leaving it stiff and fragile.

Placing rubber bands in a refrigerator is like putting this aging process into slow motion. Cold temperatures drastically reduce the kinetic energy of the molecules, slowing the rate of these destructive chemical reactions. It's the same principle that keeps food from spoiling. Conversely, enemies of rubber include heat and ultraviolet light from the sun, which act as catalysts, providing the energy needed to accelerate oxidation and cross-linking. So, for maximum longevity, the best home for that bag of rubber bands isn't a sunlit desk drawer, but the cool, dark environment of your fridge.