Instead of using glue as a polymer (as in the slime recipes above), we’re going to use PVA (polyvinyl alcohol). Most liquids are unconnected molecules bouncing around. Monomers (single molecules) flow very easily and don’t clump together. When you link up monomers into longer segments, you form polymers (long chains of molecules).


Polymers don’t flow very easily at all – they tend to get tangled up until you add the cross-linking agent, which buddies up the different segments of the molecule chains together into a climbing-rope design.


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