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SEM images of cryofracture and PLA amorphous were etched cryofracture samples: (a–e) cryofracture surfaces; (a’–e’,a’’–e’’) etcyed cryofracture surfaces: (a–a’’) PLA/PBS 70/30; (b–b’’) PLA/PBS/EGMA 70/30/5; (c–c’’) PLA/PBS/EGMA 70/30/10; (d–d’’) PLA/PBS/EGMA 70/30/15; (b–b’’) PLA/PBS/EGMA 70/30/20.
