摘要
PAN原丝的预氧化性能是决定碳纤维性能的重要指标。对P300和P700两种不同原丝在强度分别为4、8、12和16 T的磁场中进行了处理,并对处理后的原丝进行了预氧化。采用XRD、FTIR、DSC和密度法分别对预氧化纤维的预氧化程度进行了表征,结果发现磁场会引起原丝分子链段的取向排列和结晶度的提高,从而降低原丝的预氧化性能,其影响程度随着磁场强度的增大而增强。结晶和取向度较低的原丝更易于受到磁场影响。
Pre-oxidization property of PAN precursor is the key factor to determine the performance of carbon fiber.In this study,two kinds of precursors,P300 and P700,were treated in high magnetic fields of 4,8,12,16 T respectively,after then,the obtained samples were pre-oxidized.The pre-oxidization degrees of precursors were characterized by XRD,FTIR,DSC and density method.The results showed that,magnetic field can induce alignment of chain segments and increase crystallinity.That could reduce pre-oxidization degree of precursors and the influence degree increased with the enhancement of magnetic field intensity.Precursors of lower crystallinity and orientation were more likely to be influenced by magnetic field.
出处
《高科技纤维与应用》
CAS
2012年第3期20-25,共6页
Hi-Tech Fiber and Application
基金
国家自然科学基金资助项目(51073098)
关键词
磁场
聚丙烯腈
原丝
预氧化
性能
研究
magnetic field
PAN
precursor
pre-oxidization
property
research
