期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
DSC Study on the Polyacrylonitrile Precursors for Carbon Fibers 被引量:1
1
作者 Wangxi ZHANG Musen LI 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2005年第4期581-584,共4页
Different polyacrylonitrile (PAN) precursor fibers that displayed various thermal properties were studied by using differential scanning calorimetry (DSC). Results showed that some commercial PAN precursor fibers ... Different polyacrylonitrile (PAN) precursor fibers that displayed various thermal properties were studied by using differential scanning calorimetry (DSC). Results showed that some commercial PAN precursor fibers displayed double separated peaks and these fibers were of high quality because of their process stability during their conversion to carbon fibers of high performance. Some fabrication processes, such as spinning, drawing, could not apparently change the DSC features of a PAN precursor fiber. It was concluded that the thermal properties of a PAN precursor fiber was mainly determined from its comonomer content type and compositions. 展开更多
关键词 polyacrylonitrile precursor fibers Differential scanning calorimetry (DSC) Thermal properties Carbon fibers
下载PDF
New Evaluation on the Preoxidation Extent of Different PAN Precursors 被引量:9
2
作者 WangxiZHANG JieLIU JieyingLIANG 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2004年第4期369-372,共4页
Structural changes in carbon fibers at each stage of, especially, preoxidation process are well known to play a great role in achieving the ultimate product quality. Differential scanning calorimetry (DSC), scanning e... Structural changes in carbon fibers at each stage of, especially, preoxidation process are well known to play a great role in achieving the ultimate product quality. Differential scanning calorimetry (DSC), scanning electron microscope (SEM), density method and optical microscope were used to characterize the preoxidation extent. A conventional approach, e.g., density aim, to evaluate the extent of preoxidation is not very exact. A DSC curve of a PAN precursor only can provide general information, major in the temperature regime of preoxidation reaction. However, the evaluation of a preoxidation extent, especially from conventional preoxidation temperature with a great span regime of 200~400癈, is put forward in this paper, in which the evolution of core/shell morphological structure is a kind of straightforward evidence. 展开更多
关键词 PREOXIDATION polyacrylonitrile precursors and carbon fibers Core/shell morphology
下载PDF
Comparative Study on Preparing Carbon Fibers Based on PAN Precursors with Different Comonomers 被引量:1
3
作者 张旺玺 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2006年第1期26-28,共3页
Two different PAN precursors with various comonomers were wet-spun. The properties and structurul changes of PAN precursors and their evolution during preoxidation and carbonization process were characterized by the u... Two different PAN precursors with various comonomers were wet-spun. The properties and structurul changes of PAN precursors and their evolution during preoxidation and carbonization process were characterized by the use of DSC , FTIR and traditional parameters, e g, tensile strength. It is demonstrated that acrylamide( AAM ) is very effective to make the DSC peak be separated compared to methyl acrylate ( MA ). As a result, carbon fibers developed from AAM-contained precursors have a better tenacity compared to those developed from MAcontained ones. 展开更多
关键词 carbon fibers polyacrylonitrile precursors structure and properties
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部