TECHNOLOGY FOCUS - POLYMERS - Preferred Morphology: The block copolymer has a micro-phase separated morphology. The micro-phase separated morphology comprise spheres, cylinders, lamellae, ordered bi-continuous double diamond structures and/or disordered bi-continuous morphologies. Preferred Property: The block (Am) has a molecular weight of 5x102-5x105 g/mol. The polymer block (Bn) has a molecular weight of 5x102-5x105 g/mol, and the polymer block (Ck) has a molecular weight of 5x102-5x105 (g/mol). Preferred Definitions:    substituents (s1-s3)=each includes acidic substituent or their salts, preferably each includes component selected from -SO3H, -SO3-M+, -COOH, -COO-M+, -PO3H2, -PO3H-M+, -PO32-M2+ and/or -PO32-M2+, where M is an alkali or alkaline earth metal, ammonium, or alkyl ammonium;    A,C=group of formula (2), preferably selected from polymer segments (5-16) such as polymer segment of formula (5), when Am and Cp are both hydrophilic, or polymer segment (B) is of formula (2), preferably selected from polymer segments (4-9) such as polymer segment (5) and their salts, when Bn is hydrophilic, alternatively polymer segments (A and C) are each selected from polymer segments (17-20) such as polymer segments of formula (18), when Am and Cp are each hydrophobic, or polymer segment (B) is selected from polymer segments (17-20) such as polymer segments of formula (18) when Bn is hydrophobic;    Y1=-O-, -S-, -CO-, -SO2-, -C(CH3)2-, or -C(CF3)2-, -PO(T1)-, -C(CH3)(T1)-, -PO(R4)-, diphenyl methylene, diphenyl silicon, fluorenyl, an alkylene, a bond directly to the next aromatic ring or group of formula (2a);    R1-R3=H, 1C-10 alkyl, 6-18C aryl, 6-18C aralkyl, -SO3H, -SO3-M+, -COOH, -COO-M+, -PO3H2, -PO3H-M+, -PO32-M2+, or -PO32-M2+;    M=metal, ammonium or alkyl ammonium;    R4=H, 1-10C alkyl, 6-18C aryl or 6-18C aralkyl;    T1=H or a moiety having at least one substituent for proton transfer, preferably aromatic group of formula (3) (Y2=-O-, -S-, -CO-, -SO2-, -C(CH3)2-, or -C(CF3)2-, -PO(R4)-, diphenyl methylene, diphenyl silicon, fluorenyl, an alkylene, or bond directly to the next aromatic ring;    R5-R13=H, 1-10C alkyl, 6-18C aryl, 6-18C aralkyl, SO3H, -SO3-M+, -COOH, -COO31M+, -PO3H2, -PO3H-M+, PO32-M2+, and -PO32-M2+;    R4=H, 1-10C alkyl, 6-18C aryl, or 6-18C aralkyl;    M=same as defined above;and    j=1-30);and    i=1-6.    When i is greater than 1, the Y1 between sequential aromatic rings, T1 on sequential aromatic rings, and R1-R3 on sequential aromatic rings, each are same or different, and at least one aromatic ring in formula (2), T1 is not H or one of R1-R3 is -SO3H, -SO3-M+, -COOH, -COO-M+, -PO3H2, -PO3H-M+, -PO32-M2+, or -PO32-M2+. When j is greater than 1, the Y2 between sequential aromatic rings and R5-R9 on sequential aromatic rings, each are same or different, and at least one of R5-R13 is -SO3H, -SO3-M+, -COOH, -COO-+, -PO3H2, -PO3H-M+, -PO32-M2+ or -PO32-M2+.    EXAMPLE - Polymer block of formula (25) was prepared using 2,2-Bis-(4-hydroxy-phenyl)-propane, 1,3-bis-(4-fluorbenzoyl)benzene, p-cresol, potassium carbonate, anhydrous N-methyl-pyrrolidone (NMP) and anhydrous cyclohexene. The polymer block (25) (in g) (4.5), sulfonated THPE side chain monomer of formula (28) (1.930), 4,4'-difluoro-3,3'-di(potassium sulfonate)-benzophenone (0.946), potassium carbonate (0.63), anhydrous dimethyl sulfoxide (DMSO) (50 ml), anhydrous NMP (10 ml) and anhydrous benzene (25 ml) were added to a 100 ml flask equipped with a Dean-Stark trap, reflux condenser and a nitrogen inlet. The mixture was refluxed at 140degreesC for 4 hours under nitrogen. The benzene was removed and the mixture was heated for further 36 hours at 160degreesC. The mixture was filtered, diluted with DMSO and acidified with concentrated hydrochloric acid. The solution was then poured into methanol (0.6 l) under vigorous stirring. The precipitated solid was washed with methanol and dried at 100degreesC in vacuum, and triblock copolymer of formula (27) was obtained with yield of (5.6) (77%). The obtained copolymer had ion exchange capacity of 1 meq/g with excellent proton conductivity.