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. 2018 Feb 6;10(2):150. doi: 10.3390/polym10020150

Figure 5.

Figure 5

Transmission electron microscopy (TEM) images of the PTT prepared with a CuCl2/TT molar ratio of 1.0 and a TT concentration of 0.38 mol·L−1 in DMF at 25 °C for 24 h.