Figure 4. The CPC-chitosan lactate specimens were loaded to 3.5 mm displacement, unloaded, and the tensile surfaces examined with SEM. (A) Most of the surfaces were smooth and crack-free. Seldom were microcracks observed after extensive deformation. (B) A microcrack is shown in a specimen with 15% chitosan lactate (arrow indicates the crack tip). (C) The microcracks in CPC-chitosan lactate specimens were surface-localized (arrows), even after extensive deformation.

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