Compatibilization by either using
3 or 5 phr of PLA-g-MA in PLA/WS composites did not give
rise to any improvements in the impact properties of
the PLA. The stress/strain plots in Figure 5 show that the
composites have reduced toughness (area under the stress/
strain plot) and this may explain why no improvements in
impact properties were observed and this data observation
is consistent to literature.[2]