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Separation and purification of c-PCL using a recycling preparative GPC system: (a) c-PCL20; (b) c-PCL30; (c) c-PCL50; (d) c-PCL70; (e) c-PCL90; (f) c-PCL100; (g) c-PCL150; (h) c-PCL200. R1 and R2 indicate the first and second cycling runs respectively in the GPC operation. F1 means the fractionation of c-PCL product; the c-PCL product marked with yellow color was fractionated.
