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. 2016 Apr 19;8(4):150. doi: 10.3390/polym8040150

Figure 9.

Figure 9

Second heating run of DSC measurements on (A) spray-dried powder obtained at best parameter settings, (B) rotor milled powder subjected to the three step refinement process with additional sieving at 80 μm, (C) virgin PSU and (D) fine powder obtained after 10 min of ball milling the PSU pellets.