3.4. Microscopy analysis
3.4.1. Scanning electron microscopy (SEM)
SEM of fractured surface of the composites was observed to study the failure mechanisms and to observe the interaction between different components since the mechanical proper- ties depend on polymer/filler interaction (Kemala, Budianto, & Soegiyono, 2012). SEM images of fractured cross-sectional surfaces of PLA and PLA/MCC composites are shown in Fig. 4. The fractured