prov:value
| - wherein A and A??? are A-type linear polymeric segments, B and B??? are B-type linear polymeric segments, and R1, R2, R3, and R4 are either block copolymers of formulas (I), (II), or (III), or hydrogen and L is a linking group, with the proviso that no more than two of R1, R2, R3, or R4 are hydrogen.
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