NOVELTY - A material for solid polyelectrolyte comprises a multi-segmented fluoropolymer containing 2 or more fluoropolymer segments differing in monomer compositions, wherein at least 1 of the fluoropolymer segments has sulfonic acid type functional groups.    USE - The material is particularly useful as a solid polyelectrolyte which is suitable for fuel cells.    ADVANTAGE - Such material has ion conductivity and improved mechanical strength and durability.    DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for:    (i) a solid polyelectrolyte membrane made from the material;    (ii) a similar segmented fluoropolymer comprising a sulfonic acid type functional group-containing fluoropolymer segment (A1) which is a copolymer a molecular weight of 500-750,000 made from 1-50 mol.% structural units of monomer (e) of formula (I) and 99-50 mol.% structural units of at least 1 mono-sulfonic acid type functional group-containing ethylenic monomer (f), and a non-sulfonic acid type functional group-containing fluoropolymer segment (B1) which is a fluoropolymer with a molecular weight of 3000-120,000 made from 1 or more fluorinated ethylenic monomer units; and CX2=CR1-(O)n-Rf-SO2Y (I)    X, X1 = H or F;    Y = F, Cl, or OY1;    Y1 = H, alkali metal or 1-5C alkyl;    Rf = 1-40C divalent fluorinated alkylene, or 1-40C ether linkage-containing divalent fluorinated alkylene    n = 0 or 1;    (ii) another multi-segmented fluoropolymer composed of at least 1 sulfonic acid type functional group-containing fluoropolymer segment (C1) and (D1), in which (C1) is a copolymer having molecular weigh of 5000-75,000 with 13-50 mol.% structural units made from 1 or more sulfonic acid type functional group-containing fluorinated ethylenic monomer (g) of formula (I) and 87-50 mol.% structural units made from at least a non-sulfonic acid type functional group-containing fluorinated ethylenic monomer (h), and (D1) a fluoropolymer with molecular weight of 3000-120,000 made from 0.1-12 mol.% 1 or more sulfonic acid type functional group-containing fluorinated ethylenic monomer (i) of formula (I) and 87-99.9 mol.% at least 1 non-sulfonic acid type functional group-containing ethylenic monomer units (j).    DESCRIPTION OF DRAWING(S) - The figure shows a polymer with segmented polymers A and B.