| http://www.w3.org/ns/prov#value | - After neutralization of the filtrate with a suitable acid, for example acetic acid, the polyether sulfone is precipitated by pouring into a suitable precipitation medium, for example water or alcohols, such as for example methanol or isopropanol, or ater/alcohol mixtures, for example H2 O/methanol 1:1, isolated and then dried.
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