(WO9532236-A1)      Water-insol. membrane and a fuel cell contg. the membrane are claimed, the membrane comprising acid-stable polymer mols. each having at least one ion-conducting polymer segment of formula (I) covalently bonded to at least one flexible connecting polymer segment of formula (II) or (III) such that continuous H ion-conductive channels penetrate the membrane with the channels being regions contg. anionic species in an elastic matrix of (II) or (III).    An esp. pref. membrane consists of a styrene/(ethylene-butylene)/styrene copolymer (SEBS) with the styrene component being sulphonated. R1-R4 = H or lower alkyl; R5 = H, Cl or lower alkyl; R6 = H or Me; R7 = mixt. of H with -SO3H, -P(O)(OR8)OH, -R9.SO3H and/or -R9.P(O)(OR8)OH; R8 = H or lower alkyl; R9 = lower alkylene; Ar = phenyl; and m, n, p and q = 0 or 50-10,000.    ADVANTAGE -   A mechanically-stable membrane is provided which allows ion diffusion but prevents both the flow of electrons and the diffusion of gases.    (JP10503788-W)      Water-insol. membrane and a fuel cell contg. the membrane are claimed, the membrane comprising acid-stable polymer mols. each having at least one ion-conducting polymer segment of formula (I) covalently bonded to at least one flexible connecting polymer segment of formula (II) or (III) such that continuous H ion-conductive channels penetrate the membrane with the channels being regions contg. anionic species in an elastic matrix of (II) or (III).    An esp. pref. membrane consists of a styrene/(ethylene-butylene)/styrene copolymer (SEBS) with the styrene component being sulphonated. R1-R4 = H or lower alkyl; R5 = H, Cl or lower alkyl; R6 = H or Me; R7 = mixt. of H with -SO3H, -P(O)(OR8)OH, -R9.SO3H and/or -R9.P(O)(OR8)OH; R8 = H or lower alkyl; R9 = lower alkylene; Ar = phenyl; and m, n, p and q = 0 or 50-10,000.    ADVANTAGE -   A mechanically-stable membrane is provided which allows ion diffusion but prevents both the flow of electrons and the diffusion of gases.    (EP763070-B1)      Water-insol. membrane and a fuel cell contg. the membrane are claimed, the membrane comprising acid-stable polymer mols. each having at least one ion-conducting polymer segment of formula (I) covalently bonded to at least one flexible connecting polymer segment of formula (II) or (III) such that continuous H ion-conductive channels penetrate the membrane with the channels being regions contg. anionic species in an elastic matrix of (II) or (III).    An esp. pref. membrane consists of a styrene/(ethylene-butylene)/styrene copolymer (SEBS) with the styrene component being sulphonated. R1-R4 = H or lower alkyl; R5 = H, Cl or lower alkyl; R6 = H or Me; R7 = mixt. of H with -SO3H, -P(O)(OR8)OH, -R9.SO3H and/or -R9.P(O)(OR8)OH; R8 = H or lower alkyl; R9 = lower alkylene; Ar = phenyl; and m, n, p and q = 0 or 50-10,000.    ADVANTAGE -   A mechanically-stable membrane is provided which allows ion diffusion but prevents both the flow of electrons and the diffusion of gases.    (CN1152929-A)      Water-insol. membrane and a fuel cell contg. the membrane are claimed, the membrane comprising acid-stable polymer mols. each having at least one ion-conducting polymer segment of formula (I) covalently bonded to at least one flexible connecting polymer segment of formula (II) or (III) such that continuous H ion-conductive channels penetrate the membrane with the channels being regions contg. anionic species in an elastic matrix of (II) or (III).    An esp. pref. membrane consists of a styrene/(ethylene-butylene)/styrene copolymer (SEBS) with the styrene component being sulphonated. R1-R4 = H or lower alkyl; R5 = H, Cl or lower alkyl; R6 = H or Me; R7 = mixt. of H with -SO3H, -P(O)(OR8)OH, -R9.SO3H and/or -R9.P(O)(OR8)OH; R8 = H or lower alkyl; R9 = lower alkylene; Ar = phenyl; and m, n, p and q = 0 or 50-10,000.    ADVANTAGE -   A mechanically-stable membrane is provided which allows ion diffusion but prevents both the flow of electrons and the diffusion of gases.