Instructables

I have an odd question about PVC glue?

Hello my question is why dose the glue spin when it is dripped in water?  I work for a small plumbing and sewer company and I have noticed that every time the glue drips in a puddle it spins on the surface. It is pretty neat and I was curious as to why it dose that. 

Burf1 year ago
Because water and PVC glue are immiscible and the glue is less dense than water, it floats on the surface. The surface tension between the two provides a low friction coefficient and molecular motion of the glue is sufficient to let the glue globule move independent of the water.
iceng1 year ago
Long chain molecules cause the glue to spin.

Whether droplets or a long thin stream the same thing happens.

The same thing happens with maple syrup when you pour it on your pan cakes the molecules elongate as they drip and remain elongated until they reach the bottom of the fall. The molecules in the front hold up the molecules in the back that are still falling causing the elongated molecules to fall over first back and forth and then sideways creating the spinning inertia.

Since the glue floats there is little resistance to the spinning inertia so it spines.