Process for synthesising semi-aromatic polyethers

A semi-aromatic polyether based on an aliphatic diol of formula I:

• wherein
• Ar originates from a dihalogenated aromatic or heteroaromatic compound selected from dihalogenated aromatic sulfones, dihalogenated aromatic ketones, dihalogenated benzonitriles, dihalogenated diazenes, bis(halophenyl)oxadiazoles, dihalogenated nitrobenzenes, dihalogenated benzoylnaphthalenes and dihalogenated pyridines;
• R originates from an aliphatic diol;
• X is a chlorine;
• n is an integer between 2 and 100, with n being determined by size-exclusion chromatography;
• provided that R does not originate from isosorbide, cyclohexanedimethanol, tetramethylcyclobutanediol, or cis-1,5-cyclooctanediol when Ar originates from a 4,4′-halodiphenyl sulfone, and that R does not originate from isosorbide when Ar originates from a 4,4′-dihalobenzophenone;
• wherein the semi-aromatic polyether based on an aliphatic diol contains residual silicon content of between 10 and 1,000 ppm, said residual silicon content being determined by combustion/ion chromatography coupling.