Copolymer for separator, and secondary battery comprising same

A copolymer comprising:

• an acrylonitrile-based monomer unit in an amount in a range of greater than 0 wt % and 15 wt % or less;
• a hydroxyl group (—OH)-containing acrylate-based monomer unit in an amount in a range of greater than 0 wt % and 5 wt % or less;
• an acrylamide-based monomer unit in an amount in a range of greater than 80 wt % and less than 95 wt %;
• and
• an acrylic acid-based monomer unit in an amount in a range of greater than 0 wt % and 15 wt % or less, based on the total weight of the copolymer in an amount of 100 wt % %,
• wherein an alkali metal is bound to a carboxylate group of at least one acrylic acid-based monomer unit,
• wherein a secondary amine, a tertiary amine, or a combination thereof is bound to a carboxylate group of at least one acrylic acid-based monomer unit.