Multiscale Hybrid Micro-Nanocomposites Based on Carbon Nanotubes and Carbon Fibers

Table 2

Effect of CNTs on glass transition temperature and tan-delta for nanocomposites and hybrid micro/nanocomposites.

Sample description	Sample ID	Glass transition temperature (^∘C)	Tan-delta∗
Neat epoxy	A	116 ± 3	34 ± 2
0.025 wt% DWCNT-NH2 + epoxy	B	122 ± 4	27 ± 3
0.05 wt% DWCNT-NH2 + epoxy	C	122 ± 5	31 ± 4
0.1 wt% DWCNT-NH2 + epoxy	D	122 ± 3	26 ± 4
CF + epoxy	E	118 ± 5	108 ± 4
0.025 wt% DWCNT-NH2 + CF + epoxy	F	118 ± 3	89 ± 3
0.05 wt% DWCNT-NH2 + CF + epoxy	G	118 ± 6	84 ± 4
0.1 wt% DWCNT-NH2 + CF + epoxy	H	118 ± 4	100 ± 3

∗at room temperature.