Electro-optic assemblies and related materials (e.g., adhesive) for use therein are generally provided. The adhesive layer may comprise an end-capped polyurethane. Some adhesive layers comprise two or more reactive functional groups (e.g., reactive functional groups configured to react with one or more curing species such that, for example, at least one of the two or more functional groups forms a crosslink). The adhesive may also comprise a chain-extending reagent that includes one or more reactive functional groups. In some embodiments, the adhesive is cured by reacting one or more reactive functional groups with one or more curing species. Curing the adhesive may comprise two or more curing steps. In some embodiments the adhesive layer may comprise one or more cross-linkers.

A polymer and use thereof, where the polymer includes at least a structural formula represented by Formula 1; in in Formula 1, R.sub.1 is selected from a substituted or unsubstituted C1-C30 alkyl and a substituted or unsubstituted C6-C60 aryl; R.sub.2 is selected from a substituted or unsubstituted polyether group, a substituted or unsubstituted C1-C30 alkyl, a substituted or unsubstituted C1-C30 alkoxy and *-b1-S-S-b2-*; b1 and b2 are each independently selected from a substituted or unsubstituted C2-C15 chain alkyl and a substituted or unsubstituted C6-C60 aryl; R.sub.3 is an ionic liquid group; and n1 and n is an integer. The special molecular structure of the polymer enables it to have excellent room temperature ionic conductivity when applied to a polymer electrolyte.