《Table 1 DSC data of the maximally drawn PAN fibers in nitrogen.》
本系列图表出处文件名:随高清版一同展现
《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)》
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.
图表编号 | XD0044900400 严禁用于非法目的 |
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绘制时间 | 2019.02.01 |
作者 | 李晓鹏、索习东、刘耀东、李永红 |
绘制单位 | 中国科学院山西煤炭化学研究所炭材料重点实验室、中国科学院大学、中国科学院山西煤炭化学研究所炭材料重点实验室、中国科学院大学、中国科学院山西煤炭化学研究所炭材料重点实验室、中国科学院大学材料光电研究中心、中国科学院山西煤炭化学研究所炭材料重点实验室 |
更多格式 | 高清、无水印(增值服务) |
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