Block polymer and polymer electrolyte membrane comprising same

A block polymer comprising:

• a hydrophobic block;
• and
• a hydrophilic block,
• wherein the hydrophilic block includes a unit derived from a compound represented by the following Chemical Formula 1, and
• the hydrophobic block includes a cationic group and a halogen group:
• in Chemical Formula 1,
• A is —SO3H, —SO3−M+, —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;
• M is a group 1 element;
• R1 to R5 are the same as or different from each other, and each independently hydrogen;
• a halogen group;
• or a hydroxyl group;
• 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 a halogen group;
• L1 is a direct bond;
• —S—;
• —O—;
• —N(R)—;
• —SO2—;
• or a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms;
• a is an integer of 0 to 2, and when a is 2, structures in the parentheses are the same as or different from each other;
• R is hydrogen;
• or a substituted or unsubstituted alkyl group;
• n is an integer of 2 to 10, and when n is 2 or greater, structures in the parentheses are the same as or different from each other,
• wherein the hydrophobic block includes a unit derived from one or more types of a compound represented by the following Chemical Formula 3, a compound represented by the following Chemical Formula 4, and a compound represented by the following Chemical Formula 5:
• in Chemical Formula 3 and Chemical Formula 4:
• A1 and A2 are the same as or different from each other, and each independently a hydroxyl group;
• a thiol group;
• or a halogen group;
• S1 and S2 are the same as or different from each other, and each independently hydrogen;
• deuterium;
• a halogen group;
• a nitrile group;
• a nitro group;
• a hydroxyl group;
• a substituted or unsubstituted alkyl group;
• a substituted or unsubstituted cycloalkyl group;
• a substituted or unsubstituted alkoxy group;
• a substituted or unsubstituted alkenyl group;
• a substituted or unsubstituted silyl group;
• a substituted or unsubstituted aryl group;
• a substituted or unsubstituted heterocyclic group;
• -(L2)b-N+R11R12R13;
• -(L2)b-P+R11R12R13;
• or a structure represented by the following Chemical Formula 2;
• c and d are each an integer of 1 to 4;
• when c and d are each an integer of 2 or greater, structures in the two or more parentheses are the same as or different from each other;
• S3 and S4 are the same as or different from each other, and each independently hydrogen;
• a halogen group;
• an alkyl group;
• or a haloalkyl group;
• E1 and E2 are the same as or different from each other, and each independently a hydroxyl group;
• a thiol group;
• or a halogen group;
• e is an integer of 1 to 4;
• f is an integer of 1 to 3;
• when e and f are each an integer of 2 or greater, structures in the parentheses are the same as or different from each other;
• S5 is hydrogen;
• deuterium;
• a halogen group;
• a nitrile group;
• a nitro group;
• a hydroxyl group;
• a substituted or unsubstituted alkyl group;
• a substituted or unsubstituted cycloalkyl group:
• a substituted or unsubstituted alkoxy group;
• a substituted or unsubstituted alkenyl group;
• a substituted or unsubstituted silyl group;
• a substituted or unsubstituted aryl group;
• a substituted or unsubstituted heterocyclic group -(L2)b-N+R11R12R13:
• -(L2)b-P+R11R12R13;
• or a structure represented by the following Chemical Formula 2;
• S3 and S4 are each independently a halogen group or a haloalkyl group, or S5 is a halogen group or a haloalkyl group;
• and
• the hydrophobic block includes one, two or more of -(L2)b-N+R11R12R13;
• -(L2)b-P+R11R12R13;
• and a structure represented by the following Chemical Formula 2,
• in Chemical Formula 5:
• X1 is a direct bond;
• —CO—;
• —SO2—;
• or an alkylene group substituted with a halogen group;
• X2 is —O—;
• or —S—;
• X3 is a direct bond or an alkylene group substituted with a halogen group;
• k is 0 or 1;
• p, q, r and s are each independently an integer of 0 to 4;
• t, u, v and w are each independently 0 or 1;
• a sum of t, u, v and w is 1 or greater;
• a sum of p and t, a sum of q and u, a sum of r and v and a sum of s and w are each 4;
• when p, q, r and s are each 2 or greater, substituents in the parentheses are the same as or different from each other;
• R21 to R24 are the same as or different from each other, and each independently hydrogen or a halogen group;
• at least one of X1 and X3 is an alkylene group substituted with a halogen group, and at least one of R21 to R24 is a halogen group;
• R31 to R34 are hydrogen;
• -(L2)b-N+R11R12R13;
• -(L2)b-P+R11R12R13;
• or a cationic group represented by the Chemical Formula 2;
• and
• at least one of R31 to R34 is -(L2)b-N+R11R12R13;
• -(L2)b-P+R11R12R13;
• or a cationic group represented by the Chemical Formula 2;
• in Chemical Formula 2,
• L2 is a direct bond:
• —O—;
• —N(R14)—;
• —S—;
• —SO2—;
• or a substituted or unsubstituted alkylene group having 1 to 10 carbon atoms;
• b is an integer of 1 to 10;
• when b is 2 or greater, the two or more L2s are the same as or different from each other;
• and
• R11 to R15 are the same as or different from each other, and each independently hydrogen;
• or a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms.