How do I get a chlorosulfonated polymer?

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Helmut Ritter

Polymers containing electron rich aromatic moieties, like polyether ketones (PEEK) or polystyrene are candidates for chlorosulfonation. However, the MW plays an important role because cross linking takes place easily. Thus, please take polymers with rel. low MW, preferentially below 10 000 g/mol. Good luck

Khusna Widhyahrini

Thank you professor.

I have polyethersulfone that synthesized by microwave irradiation. It has low molecular weight. Did you mean that it more difficult to chlorosulfonation?

Dear researcher!

Yes, you need relatively low molecular weight of the polymer for your chlorosulfonation.

Polyethersulfone is a good candidate for this reaction .

As solvent try sulfuric acid, DMF or NMP, respectively in a ca 5- 10 weight % concentration . Higher concentration may lead to networks formations.

I hope you are successful !

With kind regards

and best wishes

Lisandra Herrera Belén

see this attachment, i hope that it helps you

Thank you, professor.

Thank you Lisandra

Nizar Matar

I prepared sulfonated polystyrene in the past where -SO3H group was attached easily to the pendant aromatic rings in the para positions . As for attaching -SO2-Cl to the rings , the attached link gives an abstract to a paper published in the journal (Macromolecules) which will, hopefully, contain the information required.

http://pubs.acs.org/doi/abs/10.1021/ma300283d

Thank you Dr. Nizar.

Once again, what is differences sulfuric acid or NMP (n-methylpyrolidone) as a solvent for chlorosulfonation?

Khusna , Sorry that I have not seen your question about the solvent until now. In my view, there are 2 criteria for selecting a solvent: suitability( which means the ability of the solvent to dissolve the polymer and the sulfonating agent) & inertness to the sulfonating agent. I would prefer chloroaliphatic hydrocarbons such as chloroform, methylene chloride, and 1,2-dichloroethane. Honestly, I have never used sulfuric acid or NMP as solvents so they need testing on very small scale. Best wishes for success.

Sorry, Dr. Nizam,, i didnt receive notifications. I tried two ways. First, i didnt use NMP and the second, i used NMP and its better. I also used Chlorosulfonic acid. I eve tried dichloromethane as a solvent, but it become steam. Thank you for attention, and i will download it.