Functionalization of diels-alder polyphenylene polymers

A composition comprising a structure having the formula (III) or (IV):

• or a salt thereof, wherein:
• each RH is, independently, H, optionally substituted C1-12 alkyl, optionally substituted C1-12 haloalkyl, optionally substituted C1-12 heteroalkyl, halo, optionally substituted C1-12 perfluoroalkyl, optionally substituted aryl, optionally substituted alkaryl, optionally substituted arylalkoxy, optionally substituted aryloxy, optionally substituted aryloxycarbonyl, optionally substituted aryloyl, optionally substituted arylcarbonylalkyl, optionally substituted arylsulfonyl, or optionally substituted arylsulfonylalkyl;
• each R1 and R3 is, independently, H, halo, optionally substituted C1-12 alkyl, optionally substituted C1-12 haloalkyl, optionally substituted C1-12 heteroalkyl, optionally substituted C1-12 perfluoroalkyl, RS, RP, RC, or RF, wherein RS is an acidic moiety comprising a sulfonyl group, RP is an acidic moiety comprising a phosphoryl group, RC is an acidic moiety comprising a carbonyl group, and RF is an electron-withdrawing moiety;
• each ArL is, independently, a bivalent linker comprising optionally substituted arylene;
• each ArM is, independently, a bivalent linker comprising optionally substituted arylene;
• each q is, independently, an integer of from 0 to 5;
• each is, independently, an integer of from 0 to 5, wherein at least one is not 0;
• each of m and n is, independently, an integer of from about 1 to 1000;
• L′ is a sublink;
• Ar* is a hydrophobic segment;
• and
• each RL is, independently, a reactive end group;
• wherein at least one RH comprises an optionally substituted aryl group.