3.5. Film transparency
The visual study of the transparency of PLA and the PLA/MCC
composites with different MCC contents are presented in Fig. 6.
Generally, the transparency of the PLA/MCC composites was good
but as seen in Fig. 6(b)–(d) some white spots are visible in the
PLA/MCC composites and were clearly observed as the MCC content
was increased. These spots are expected to be MCC aggregates in the
PLA matrix. The synthesized PLA/MCC composites is characterized
by good thermal properties and can be used in packaging, automotive
and medical applications where properties such strength and
stiffness are not important.