The fracture surfaces for the 40 wt% lignocellulosic filler reinforced
composites were examined using SEM for both BF and
BMF. Other composites were examined as well (i.e. 20 and 60 wt%
fibers contents), but the results were found to be most apparent
for the 40 wt% fiber content level. Whereas a rather smooth fracture
surface was seen for unfilled PE, fiber pull out as well as
holes, especially for BF, resulting from fiber delamination were
observed for the composites reinforced with unmodified fibers