[solmaz]

Hi everyone,
I polymerized chitosan with two different monomers of the same polyions but different counterions, separately . Although, they have the same reaction scheme but they show different charge densities. What is the scientific reason for that?
Thanks in advance,

[wildfyr]

What type of polymerization? Can you give some more details/specifics?

[solmaz]

In order to change the chitosan properties, I did polymerization reaction with two cationic monomers, separately,which they have same polyions but different counterions.
Although both monomers have the same cationic polyions, but the charge density of  polymerized chitosan with two monomers were different. I am wondering how can be the effects of counterions in charge density for chitosan-monomer?

One counterion is chloride and the other one is sulfate.

[wildfyr]

What type of polymerization?

Was it a free radical polymerization of an acrylate with a chitosan pendant group? Was it a ROP polymerization initiated from chitosan? Incredibly important detail that I feel silly asking twice.

I will point out that all other things equal, chloride and sulfate have different molar volumes and one is -1 and the other is -2

[solmaz]

Thanks for your respond. It is free radical Alkene polymerization.