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SEM images of pure poly-l-lactide (PLLA) film and films containing 10 wt% T-PPy and S-PPy, (a–c) physical images of three films, scar bar is 1 cm (pure, T-PPy, and S-PPy, in turn)), (d–f) SEM images of three films at 104 magnification, scar bar is 200 μm (10 wt% PPy, T-PPy, and S-PPy, in turn), (g–i) SEM images of three films at 10,000 magnification, and scar bar is 1 μm (10 wt% PPy, T-PPy, and S-PPy, in turn).
