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. 2020 Jul 19;12(7):1604. doi: 10.3390/polym12071604

Figure 2.

Figure 2

(A) Fourier transform infrared spectra and (B) thermogravimetric analysis of non-porous m-PBI and m-PBI350-x membranes. (C) Demonstration of the robustness of the freestanding m-PBI350-2.