《Table 1 DSC data of the maximally drawn PAN fibers in nitrogen.》

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《陈化时间对干喷凝胶纺聚丙烯腈纤维结构和环化反应的影响（英文）》

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Ti:initial temperature，Tp:exothermic peak temperature，Te:ending temperature，ΔH:enthalpy.

Figs.11 A1 and B1 show the w eight loss curves from 30 to 200℃.These w eight losses w ere ascribed to the residual solvent（DM F or DM SO）inside the as-spun fibers.For the PAN/DM F system，the w eight losses w ere in the range of 2-4 w t%for the asspun fibers regardless gelation times.Whereas，for the PAN/DM SO system，the w eight losses w ere as high as 13 w t%for the as-spun PAN fibers w ithout gelation，and 8 w t%and 3 w t%after low temperature gelation for 2 and 5 d，respectively.The relatively large amount of DM SO in the as-spun fibers from the PAN/DM SO system suggested that the outw ard diffusion of DM SO of the PAN/DM SO solution inside gelation bath w as much slow er than that of the PAN/DM F solution.During low temperature gelation，the outw ard diffusion of DM SO continued to reach a balance，w hich is consistent to the results in the first section.Figs.11 A2 and B2 show the w eight loss curves of PAN fibers during cyclization in nitrogen.For both solvent systems，a longer gelation time led to a low er cyclization temperature.For the PAN/DM F system，the w eight loss initial temperature monotonously and slow ly decreased w hen gelation temperature increased.For the PAN/DM SO system，the initial w eight loss temperature didn’t change w hen gelation time increased from 0 to 2 d，and dramatically decreased w hen gelation time increased to 5 d and beyond.The DSC curves of PAN fibers are show n in Fig.12 and the corresponding data are summarized in Table 1.