| 主权项 |
1. A process for manufacturing a polymer electrolyte membrane, said process comprising:
(i) providing a composition [composition (C1)] comprising: at least one fluoropolymer [polymer (F)] comprising recurring units derived from at least one fluorinated monomer [monomer (F)] and at least one hydrogenated monomer comprising at least one hydroxyl group [monomer (OH)], at least one metal compound [compound (M1)] of formula (I):
X4-mAYm (I) wherein m is an integer from 1 to 3, A is a metal selected from the group consisting of Si, Ti and Zr, Y is a hydrolysable group and X is a hydrocarbon group comprising at least one —N═C═O functional group, a liquid medium [medium (L)], an electrolyte medium comprising at least one metal salt [medium (E)], and optionally, at least one metal compound [compound (M2)] of formula (II):
X′4-m′A′Y′m′ (II) wherein m′ is an integer from 1 to 4, A′ is a metal selected from the group consisting of Si, Ti and Zr, Y′ is a hydrolysable group and X′ is a hydrocarbon group, optionally comprising at least one functional group different from the —N═C═O functional group; (ii) reacting at least a fraction of the hydroxyl groups of the monomer (OH) of said polymer (F) with at least a fraction of said compound (M1) and, optionally, at least a fraction of said compound (M2) thereby providing a composition [composition (C2)] comprising at least one grafted fluoropolymer [polymer (F-g)] comprising recurring units derived from at least one fluorinated monomer [monomer (F)] and at least one hydrogenated monomer [monomer (HH)], said monomer (HH) comprising: at least one pendant side chain comprising an end group of formula —O—C(O)—NH—Z-AYmX3-m (M1-g), wherein m, Y, A, X have the same meaning as defined above and Z is a hydrocarbon group, optionally comprising at least one —N═C═O functional group, and optionally, at least one pendant side chain comprising an end group of formula —O-A′Y′m′-1X′4-m′ (M2-g), wherein m′, Y′, A′, X′ have the same meaning as defined above; (iii) hydrolysing and/or condensing the end groups of formula —O—C(O)—NH—Z-AYmX3-m (M1-g) and, optionally, the end groups of formula —O-A′Y′m′-1X′4-m′ (M2-g) of the polymer (F-g) thereby providing a composition [composition (C3)] comprising at least one fluoropolymer hybrid organic/inorganic composite [polymer (F-h)]; (iv) processing into a polymer electrolyte membrane the composition (C3) provided in step (iii); and (v) drying the polymer electrolyte membrane provided in step (iv). |
