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The results reveal that the ASCNT has about 87% weight loss between 600 and 1150 [degrees] C (Fig.
Total weight losses of the pCNT and modified CNT are lower than that of ASCNT due to the absence of the disordered carbon structures and catalyst particles after purification in CNT structure.
Electrical resistivity values of the composites based on pCNT and modified CNT are higher than those of the composites based on ASCNT, due to the lower electrical conductivity of the CNT after surface treatment.
A sharp decrease in the tensile strength value of the PET-based composite with respect to neat PET can be observed after incorporating the ASCNT. Also the enhancement in the tensile modulus is limited after ASCNT addition.
Moreover, composites prepared with PEG and DGEBA-treated CNT have higher impact strength values when compared with composites based on ASCNT (Table 7), which may be due to the plasticizing effect induced by the long alkyl chains  present in the surface modifier structures (Table 2).
The reason for this may be the lack of interactions between the ASCNT and PET.
Purification of CNT results in larger agglomerate size when compared with composite containing ASCNT. The larger CNT agglomerates in the composites cause an increase in the stress concentration of their neighborhoods during mechanical testing.
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- Asclepias verticillata
- Asclepius' cup