Biomedical Engineering Reference
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Figure 3. TGA traces of short delignified bamboo fiber reinforced composites in presence of ----in
situ melt grafting of maleic anhydride (MA)/ glycidyl methacrylate (GMA) ( W=
L
first weight loss,
W=
L
second weight loss).
The composites, reported in this chapter, are multi-component system after using
compatibilizer and the degradation patterns depend on the extent of hydrogen bonding
network of interface. There is no definite trend in the weight loss of composite com-
ponent as a function of p-grafted polymer while increasing first weight loss as a func-
tion of i-grafted polymer is observed (Figure 2 and 3). The thermal stability is good at
concentration of 0.91 for i-grafted GMA as well as 0.75 for p-grafted GMA. ----in situ
grafted MA polymer composites have slightly lower thermal stability in comparison
to p-grafted MA. This might be due to the presence of free MA group/unreacted MA
in the final product.
melting Behavior and Crystallinty index of differently Compatibilized
Composites
The melting behavior curve of p-grafted MA polymer composites is shown in Figure
4. The endothermic transition is characterized by noting the peak of melting endo-
therm (T m ) and the heat of fusion (calculated from the area under the melting peak).
The shoulder before the melting peak in the composite increased as a function of
p-grafted polymer. As the MA content increased, the composites started to melt at a
lower temperature as shown in Figure 4. The melting peak increased around 4°C as a
function of increasing MA content. Figure 5 shows the melting behavior of i-GMA/i-
MA grafted polymer composites. The melting and crystallization trend are not similar
in the composites due to the different extent of hydrogen bonding network formation
at the interface. The fusion peak of 30 wt% filled bamboo fiber LLDPE composite
was at 103°C (Kumar et al., 2010). The melting peak increased around 10°C in both
 
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