Synthesis and Evaluation of a Water-Soluble Hyperbranched Polymer as Enhanced Oil Recovery Chemical

Figure 6

SEM images of HPAM and hyperbranched polymer: (a) HPAM solution at 20 μm, 5000x; (b) HPAM solution at 10 μm, 10000x; (c) HPAM solution at 5 μm, 20000x; (d) hyperbranched polymer solution at 20 μm, 5000x; (e) hyperbranched polymer solution at 10 μm, 10000x; (f) hyperbranched polymer solution at 5 μm, 20000x.

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