| 摘要 |
PURPOSE: Provided are a polymer in which phosphonic acid derivative groups are directly bound to aromatic rings, and which is useful as materials for solid polymer type fuel cell and particularly excellent in radical resistance, and a process for the production thereof. CONSTITUTION: The aromatic polymer phosphonic acid derivative is represented by the formula (2), or free acid form of the aromatic polymer phosphonic acid derivative is represented by formula (3). In the formulas, -Z- represents -SO2- or -CO-, x and y are average molar ratios in the polymer and respectively represent 0.01 to 0.99, provided that the sum of x and y is 1; -Ar- represents a divalent aromatic group having 4 to 18 carbon atoms which may contain hetero atoms, and said -Ar- may have one or more substituents; R and R' each independently represent an alkyl group; m and n independently represent an average number of substituents per unit structure (-Ar-O-) of an aromatic polymer compound (formula 1), m is 0 to 8, n is a positive number of 8 or less, and the sum of m and n is 8 or less, and R'' represents hydrogen or an alkyl group(in the formula (1), -Z-, x, y, -Ar- m and n have the same meaning as above). |
