(US5422411-A)      A polymeric compsn. comprises (I), where m is greater than 0, and at least one of n, p and q is greater than zero, A1, A2 and A3 are e.g. alkyls, halogens, CyF2y+1 where y is greater than 0, O-R (where R is e.g. alkyl, perfluoroalkyl or aryl), CF=CF2, CN, NO2 and OH, and X is e.g. SO3H, PO3H2, CH2PO3H2, COOH, OSO3H, OPO3H2, OArSO3H where Ar is an aromatic, NR3+ (where R is e.g. alkyl, perfluoroalkyl or aryl) and CH2NR3+ (where R is e.g. alkyl, perfluoroalkyl or aryl).    USE/ADVANTAGE -   Suitable for use as membranes, partic. ion-exchange membranes and solid polymer electrolytes in electrochemical applications. High yield, low cost ion-exchange polymer membrane has good chemical and mechanical properties.    (JP8512358-W)      A polymeric compsn. contains a polymer of formula (I):    where m = integer greater than 0; at least one of n, p, q = integer greater than 0; A1, A2, A3 = alkyl, halogen, CyF2y+1, O-R, CF=CF2, CN, NO2, OH; y = integer greater than 0; R = perfluoroalkyl or aryl; X = SO3H, PO3H2, CH2PO3H2, COOH, OSO3H, OPO3H2, OArSO3H NR3+, CH2NR3+; and Ar = aromatic gp.    USE -   The polymeric compsn. is used as an ion exchange membrane in an electrochemical fuel cell (claimed).    ADVANTAGE -   The membranes are produced in high yield and are low cost with good chemical and mechanical properties such as high heat stability, chemical resistance and tensile strength.    (JP2000138068-A)      A polymeric compsn. contains a polymer of formula (I):    where m = integer greater than 0; at least one of n, p, q = integer greater than 0; A1, A2, A3 = alkyl, halogen, CyF2y+1, O-R, CF=CF2, CN, NO2, OH; y = integer greater than 0; R = perfluoroalkyl or aryl; X = SO3H, PO3H2, CH2PO3H2, COOH, OSO3H, OPO3H2, OArSO3H NR3+, CH2NR3+; and Ar = aromatic gp.    USE -   The polymeric compsn. is used as an ion exchange membrane in an electrochemical fuel cell (claimed).    ADVANTAGE -   The membranes are produced in high yield and are low cost with good chemical and mechanical properties such as high heat stability, chemical resistance and tensile strength.    (JP3061197-B2)      A polymeric compsn. contains a polymer of formula (I):    where m = integer greater than 0; at least one of n, p, q = integer greater than 0; A1, A2, A3 = alkyl, halogen, CyF2y+1, O-R, CF=CF2, CN, NO2, OH; y = integer greater than 0; R = perfluoroalkyl or aryl; X = SO3H, PO3H2, CH2PO3H2, COOH, OSO3H, OPO3H2, OArSO3H NR3+, CH2NR3+; and Ar = aromatic gp.    USE -   The polymeric compsn. is used as an ion exchange membrane in an electrochemical fuel cell (claimed).    ADVANTAGE -   The membranes are produced in high yield and are low cost with good chemical and mechanical properties such as high heat stability, chemical resistance and tensile strength.    (EP720628-B1)      A polymeric compsn. contains a polymer of formula (I):    where m = integer greater than 0; at least one of n, p, q = integer greater than 0; A1, A2, A3 = alkyl, halogen, CyF2y+1, O-R, CF=CF2, CN, NO2, OH; y = integer greater than 0; R = perfluoroalkyl or aryl; X = SO3H, PO3H2, CH2PO3H2, COOH, OSO3H, OPO3H2, OArSO3H NR3+, CH2NR3+; and Ar = aromatic gp.    USE -   The polymeric compsn. is used as an ion exchange membrane in an electrochemical fuel cell (claimed).    ADVANTAGE -   The membranes are produced in high yield and are low cost with good chemical and mechanical properties such as high heat stability, chemical resistance and tensile strength.