prov:value
| - The anionic polymer comprises repeating units of formula (Ia): wherein Ri is OH, OC (O) R5, O-M+V, (CHZ)Rb, (CHRZ)Rb, or aryl, wherein n is at least 1, R5is a lower alkyl, M is a metal ion, V is an integer from 1 to 5, Rb is OH, OC (O) R5, O-M+V, and Rz is a lower alkyl or aryl, R2, R3 and R4 are each independently selected from the group consisting of hydrogen, straight-chain or branched-chain
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