Crosslinked polymer compositions, gas separation membranes of such crosslinked polymer compositions, methods of making such membranes, and methods of separating gases using such membranes

Gas separation membrane compositions including at least one crosslinked polymer, gas separation membranes made of such compositions, methods for making such gas separation membranes, and methods of using such membranes to separate gases are described. In one embodiment, the crosslinked polymer includes polyarylene ethers (PAE).