**4. Conclusions**

**Loss weight (%) at temperature (°C)**

**Material 200 250 300 350 400 450 500** Chicken feather 89.7 83.8 65.3 38.6 29.7 25.3 23.0 TPS-EVOH 81.5 76.3 69.6 49.8 28.4 8.7 3.9 SB1 99.5 99.2 98.9 97.9 87.5 36.4 0.7 SB1-45/TPS-EVOH/CF 97.3 95.6 92.6 86.0 74.8 33.5 2.7 SB1-50/TPS-EVOH/CF 97.8 96.7 94.7 90.3 78.9 33.8 0.1 SB1-55/TPS-EVOH/CF 98.5 97.7 96.4 93.5 82.5 34.8 0.7 SB2 99.4 99.0 98.7 97.7 90.0 50.0 4.6 SB2-45/TPS-EVOH/CF 97.4 96.0 93.1 87.0 77.5 43.3 4.1 SB2-50/TPS-EVOH/CF 97.3 95.8 93.7 89.6 81.2 45.2 1.5 SB2-55/TPS-EVOH/CF 98.9 98.0 96.6 94.2 85.5 46.7 0.8 SB3 99.7 99.4 99.2 98.5 90.2 49.0 0.1 SB3-45/TPS-EVOH/CF 96.6 94.8 91.6 85.0 73.5 37.6 0.9 SB3-50/TPS-EVOH/CF 97.7 96.4 94.0 89.3 77.4 41.6 1.2 SB3-55/TPS-EVOH/CF 98.7 97.8 96.1 93.2 82.9 45.0 1.7

**Figure 7.** TGA thermograms for SB3, TPS-EVOH, CF, and SB3/TPS-EVOH/CF composite.

34 Applications of Modified Starches

**Table 3.** Thermal data of loss weight for SB/TPS-EVOH/CF composites at different temperatures.

The infrared spectroscopy was not conclusive but indicates that there is no chemical interaction among components of composite. According with the styrene content present in the blend, it is possible to observed a better interaction among soft segments of the SB elastomers with the composites TPS-EVOH/CF. DMA results showed that the inclusion of SB elastomers in TPS-EVOH/ CF do not have a positive effect, due to the decreased storage modulus compared to TPS-EVOH and pure SB, but the composites with lower SB content have a better behavior at lower and higher temperatures compared to the rest of the composites. The composites prepared with CF have been reported before that generates a similar behavior, but in this case, there was a synergetic effect, due to the structure of the composite material, so it can be attributed to SB elastomer of CF particles. The thermal behavior of the composites is very similar to that of the elastomer, which provides higher thermal stability as the styrene content increases therein.
