Cross-Linking Polymers & Slime Consistency

[mirandasatterley]

[SOLVED] Cross-linking polymers

Homework Statement

What changes in consistency (if any) do you expect when adding more borax solution to your slime? Why?

Homework Equations

None

The Attempt at a Solution

Slime is a cross-linked polymer.
Borax (borate ion) is the cross-link.
So if more of the borax solution is added, then the slime will become more cross linked and therefore more solid and less pliable.

Is this correct?

 

[chemisttree]

That sounds right.

 

[Blueshift5]

Yes, your understanding is correct. Cross-linking is a process in which polymer chains are connected together, forming a network. In the case of slime, the borate ions act as cross-linkers, connecting the long strands of glue molecules together to form a gel-like consistency. As more borax solution is added, more cross-links are formed, making the slime more solid and less stretchy. This is because the cross-links restrict the movement of the polymer chains, making it harder for them to flow past each other. Therefore, the more cross-links there are, the more solid and less pliable the slime will be.