Polymer and polymer separator comprising same

A polymer comprising:

• a hydrophilic block;
• and
• a hydrophobic block,
• wherein the hydrophilic block comprises a unit derived from a compound represented by the following Chemical Formula 1, and
• the hydrophobic block comprises a unit derived from a fluorine-containing compound:
• wherein
• L1 is a direct bond;
• —S—;
• —O—;
• —NRa—;
• —SO2—;
• or a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms;
• A is —SO3H, —COOH, —COO−M+, —PO3H2, —PO3H−M+, —PO32−2M+, —O(CF2)mSO3H, —O(CF2)mSO3−M+, —O(CF2)mCOOH, —O(CF2)mCOO−M+, —O(CF2)mPO3H2, —O(CF2)mPO3H−M+ or —O(CF2)mPO32−2M+;
• m is an integer of 2 to 6, and M is a group 1 element;
• R1 to R5 are the same as or different from each other, and each independently is hydrogen;
• a halogen group;
• or a hydroxyl group, and at least two of R1 to R5 are a halogen group;
• or a hydroxyl group;
• R6 and R7 are the same as or different from each other, and each independently is a halogen group;
• Ra is hydrogen;
• or a substituted or unsubstituted alkyl group;
• and
• n is an integer of 2 to 10, and when n is an integer of 2 or greater, structures in the parentheses are the same as or different from each other.