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. 2018 Jan 18;10(1):90. doi: 10.3390/polym10010090

Figure 2.

Figure 2

SEM images of the three kinds of polyester films degraded for different lengths of time. Poly(ethylene succinate) (PES): (a–d); poly(butylene succinate) (PBS): (e–h); and poly(hexylene succinate) (PHS): (i–l) degraded for 0, 2, 4 and 10 h.