The melting characteristics of PE-based composites reinforced
with BF, BMF, M-BF and M-BMF obtained from DSC analysis are
presented in Table 2. The melting of the unfilled PE revealed an
endothermic event with an endothermic peak centered at 133 ◦C.
A two-step melting was observed (diagram not shown). The reason
for a two-step melting could be melt recrystallization during the
heating rate, secondary nucleation of crystals in polymer materials
caused by impurities or induced by a dual population of crystallite
sizes. The appearance of the two-step melting peaks may overcome
by changing the DSC program by applying heating, cooling
then reheating again. Because of this complex endothermal peak,
the degree of crystallinity of the samples was not determined. The
addition of the fibers or maleated fibers in PE did not change significantly
the melting temperature. However, it is observed that
the addition of banana fibers obtained by alkaline pulping (BF and
M-BF) tend to slightly decrease the melting point compared to the
neat matrix and microfibrils reinforced composites.
The melting characteristics of PE-based composites reinforcedwith BF, BMF, M-BF and M-BMF obtained from DSC analysis arepresented in Table 2. The melting of the unfilled PE revealed anendothermic event with an endothermic peak centered at 133 ◦C.A two-step melting was observed (diagram not shown). The reasonfor a two-step melting could be melt recrystallization during theheating rate, secondary nucleation of crystals in polymer materialscaused by impurities or induced by a dual population of crystallitesizes. The appearance of the two-step melting peaks may overcomeby changing the DSC program by applying heating, coolingthen reheating again. Because of this complex endothermal peak,the degree of crystallinity of the samples was not determined. Theaddition of the fibers or maleated fibers in PE did not change significantlythe melting temperature. However, it is observed thatthe addition of banana fibers obtained by alkaline pulping (BF andM-BF) tend to slightly decrease the melting point compared to theneat matrix and microfibrils reinforced composites.
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