| http://www.w3.org/ns/prov#value | - (IV): ##STR12## and (c) carboxylic or dicarboxylic acid monomer units of the formula (V): ##STR13## in which X=1 to 4, R1 is --H or --CH3, R2 is --H or an alkyl group having from 1 to 4 carbon atoms, and R3 is an alkyl group having from 1 to 20 carbon atoms, and R4 is an alkyl group having from 1 to 3 carbon atoms, said ring-brominated aromatic monomer units including an average of at least about
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