The presence of certain impurities in diphenyl sulfone have a deleterious effect on the properties of the poly(aryletherketone)s produced therein, including one or more of color, melt stability, molecular weight, crystallinity, etc. and here identify those impurities and provide processes for the recovery of the diphenyl sulfone.

The present invention relates to a resin composition including a substance capable of reacting reversibly with a carbon dioxide gas, and a hydrocarbon-based polymer; a carbon dioxide gas separation membrane obtained from the resin composition; a carbon dioxide gas separation membrane module including the separation membrane; and a carbon dioxide gas separation apparatus including at least one type of the module.

Aspects of the present disclosure generally describe polyarylether ketones and methods of use. In some aspects, a composition includes one or more polymers of formulae (I), (II), or (III):

##STR00001##

The present invention relates to a porous membrane suitable for use in high pressure filtration method.

The present specification relates to a block polymer and a polymer electrolyte membrane comprising the same, a membrane-electrode assembly comprising the polymer electrolyte membrane, a fuel cell comprising the membrane-electrode assembly, and a redox flow battery comprising the polymer electrolyte membrane.

The present invention relates to polymers and copolymer including a poly(phenylene) structure, as well as a long tether. In some embodiments, the long tether facilitates a reaction between the poly(phenylene) structure and another subunit of a second polymer. In some embodiments, the tether is flexible.

The present invention relates to polymers and copolymer including a poly(phenylene) structure, as well as a long tether. In some embodiments, the long tether facilitates a reaction between the poly(phenylene) structure and another subunit of a second polymer. In some embodiments, the tether is flexible.

Aspects of the present disclosure generally describe polyarylether ketones and methods of use. In some aspects, a composition includes one or more polymers of formulae (I), (II), or (III): ##STR00001## ##STR00002##

The present invention relates to polymers and copolymer including a poly(phenylene) structure, as well as a long tether. In some embodiments, the long tether facilitates a reaction between the poly(phenylene) structure and another subunit of a second polymer. In some embodiments, the tether is flexible.

Aspects of the present disclosure generally describe polyarylether ketones and methods of use. In some aspects, a composition includes one or more polymers of formulae (I), (II), or (III):

##STR00001## ##STR00002##