Cross-linked polymer.?

I'd done this experiment which purposed to cross-linked a linear polymer and to observe changes in physical properties of produced gel as a result of the cross-linking.





In this experiment, the polyvinyl alcohol (PVA) is cross-linked by a hydrated borax molecule.





For information,there are six reaction take place.


1- (PVA with Mn=70000, Concentration=5%, V=10 ml) mix with (Borax, Concentration 5%, V=1.0ml).





2- (PVA with Mn=70000, Concentration=5%, V=10 ml) mix with (Borax, Concentration 10%, V=1.0ml).





3. (PVA with Mn=70000, Concentration=10%, V=10 ml) mix with (Borax, Concentration 5%, V=1.0ml).





4. (PVA with Mn=31000, Concentration=5%, V=10 ml) mix with (Borax, Concentration 5%, V=1.0ml).





5. (PVA with Mn=31000, Concentration=5%, V=10 ml) mix with (Borax, Concentration 10%, V=1.0ml).





6. (PVA with Mn=70000, Concentration=5%, V=10 ml) mix with (Borax, Concentration 10%, V=1.0ml).





Gel is produced.


How is the structure of the gel? Plz someone help me.

Cross-linked polymer.?
you havent listed your results, we cant help without them