TECHNOLOGY FOCUS - POLYMERS - Preferred Compound: Polyarylene consists of repeating structural unit derived from aromatic sulfonated derivative, and repeating unit of formula (2'). Polyarylene consists of repeating unit (1' or 2') (0.5-100 mol%) and repeating unit of formula (A') (0-99.5 %).A and Ar = same as defined above;R1-R8 = H atom, fluorine atom, alkyl group, fluorine substituted alkyl group, allyl group and aryl group;W = bivalent electron-attractive group;T = divalent organic group;andp = 0 or positive integer.Preferred Process: Coupling polymerization of aromatic compound containing aromatic sulfonate derivative is carried out. The obtained polyarylene is hydrolyzed, and sulfonic acid ester group is converted into sulfonic acid group to manufacture polyarylene having sulfonic acid group. Preferred Definitions:    Ar = phenyl group, naphthyl group, anthracenyl group and phenanthryl group;    Ra,Rb = 4-20C group linear hydrocarbon group, branched hydrocarbon group, alicyclic hydrocarbon group and/or five-membered heterocyclic ring;    A = -CO-, -CONH-, -(CF2)p, -C(CF3)2-, -COO-, -SO- and -SO2-;    B = -O-, -S-, -CH=CH-, -C=C-, and group of formula (a) and (b); and    p = 1-10.    SPECIFIC COMPOUNDS - 63 specific aromatic sulfonate derivatives are disclosed, such as compound of formulae (1,2).    EXAMPLE - 5-(2,5-dichloro benzoyl)-2-fluoro benzene sulfonyl chloride (in g) (28.8) and pyridine (100 mL) were mixed and cooled to 5 degrees C or less. 2,2-dimethyl-1-propanol (13.8) was added, stirred for 30 minutes and cooled to 4 hours. The resulting solution was diluted using toluene, and washed twice with hydrochloric acid aqueous solution. Organic layer was separated and dried with magnesium sulfate. 5-(2,5-dichloro benzoyl)-2-fluoro benzenesulfonic-acid neopentyl (26) was obtained. The obtained compound (20.6), 4,4'-dichloro benzophenone-2,2-bis (4-hydroxyphenyl)-1,1,1,3,3,3,-hexafluoro propane polycondensate (8.57) having number average molecular weight of 11200, bis(triphenylphosphine) nickel dichloride (0.98), sodium iodide (0.23), triphenylphosphine (5.25) and zinc (7.84) were mixed, heated at 40degreesC, and vacuum-dried. Dehydrated dimethyl acetamide was added to the product, and polymerization was initiated and continued for 3 hours at less than 90 degrees C. The resulting product was diluted in dehydrated dimethyl acetamide and insoluble content was removed by filtration. Lithium bromide (6.4) was added to the concentrated solution, and heat-stirred at 120 degrees C for 7 hours. Then, acetone was added and reaction solution was solidified. The solid was filtered, washed with distilled water and dried at 70 degrees C for 12 hours to obtain polymer (18.8). Polymer had number average molecular weight of 100000, weight average molecular weight of 350000 and ion exchange capacity of 2.16 meq/g. A film having thickness of 40 microns was formed using the obtained polymer. The film had proton conductivity of 0.32 S/cm, thermal decomposition initial temperature of 260 degrees C, and favorable water resistance, tensile strength characteristics and Fenton's reagent resistance.