Flubber (material)

Flubber (named from the film The Absent-Minded Professor), Glorp, Glurch, or Slime is a rubbery polymer formed by cross-linking of polyvinyl alcohol (PVA) with a borate compound.

[1] The gelation process entails formation of a borate ester that cross links the chains of the PVA.

[3] The individual polymer chains are bound together by weak hydrogen bonds.

The resulting polymer network is composed of strands of polyvinyl alcohol held together side-by-side by the borate molecules.

It is evident that this cross linking is weak because of the ease with which the slime flows and pulls apart.