Page 87 - Carbon Nanotube Fibres and Yarns

80 Carbon Nanotube Fibers and Yarns

Fig. 5.5 SEM images of (A) highly crystallized interphase PAN on SWNTs; (B) carbonized
samples at 1100°C; (C) HR-TEM images; and (D) WAXD curves for carbonized and graphi-
tized samples [37]. (Source: Y.Y. Zhang, N. Tajaddod, K.A. Song, M.L. Minus, Low temperature
graphitization of interphase polyacrylonitrile (PAN), Carbon 91 (2015) 479–493.)

addition of nanoparticles, the E′ would not change or even slowly decrease
during dynamic straining.
The improvement of storage modulus G′ of the nanocomposites caused
by dynamic straining is ascribed to the development of interphase. Fig. 5.6B
shows that both crystal size and crystallinity of the PAN/CNT nanocom-
posites increase with dynamic straining due to the interfacial crystallization