Subject: What is the formula and chemical equation for glubber and glue putty?

I'm trying to add a little more content to the glubber and glue putty lab.  
Glubber, by my definition, is created by mixing white glue with a borax 
solution.  Glue putty is created using white glue and a powdered starch 
solution.  (Liquid starch doesn't work.)

What is the chemical reaction occuring to create these two compounds?  I've 
read a little about glue being an aliphatic polymer, vinyl and borax cross 
linking, but I'd love to see it in an equation  with a drawing so I can explain 
the differences in elasticity to my students.

Thank You!!
Stacy

Re: What is the formula and chemical equation for glubber and glue putty?