In some embodiments, a first polymer is a polymer selected from the group consisting of (i) ethylene copolymers with other alkylenes, (ii) polybutenes, (iii) aromatic group-containing copolymers, (iv) epichlorohydrin-containing polymers (v) poly(alkylene-co-alkyl(meth)acrylates), and (vi) diolefin-derived, non-aromatic polymers and copolymers.