Patent ID: 8017682

Claim:
A composition comprising a separation matrix comprising a linear acrylamide copolymer compound comprising a first monomeric component selected from at least one monomer of a formula CH 2 C(R 1 )C(O)NR 1 ′R 1 ″ wherein R 1 is selected from H and methyl moieties; and R 1 ′ and R 1 ″ are independently selected from H, C 1 to about C 4 linear alkyl moieties, C 1 to about C 4 substituted linear alkyl moieties, C 1 to about C 4 branched alkyl moieties, and C 1 to about C 4 substituted branched alkyl moieties; and a second monomeric component selected from at least one monomer of a formula CH 2 C(R 2 )C(O)NR 2 ′R 2 ″ wherein R 2 is selected from H and methyl moieties; and R 2 ′ and R 2 ″ are independently selected from H, from about C 1 to about C 24 linear alkyl moieties and from about C 1 to about C 24 branched alkyl moieties, providing at least one of R 2 ′ and R 2 ″ is at least about C 6 , said compound selected from random and block copolymers, said compound in a fluid medium wherein the concentration of said copolymer ranges from about a concentration sufficient for intramolecular interaction of at least one of said R 2 ′ and R 2 ″ moieties to at least about a concentration sufficient for intermolecular physical cross-linking of at least one of said R 2 ′ and R 2 ″ moieties.