Mesophase formation investigation in pitches by NMR relaxometry

被引：0
|
作者：
dos Santos Lima, Antonio Luis [1 ]
Pinto, Angelo C.
San Gil, Rosane A. S.
Tavares, Maria Ines B.
机构：
[1] Univ Fed Rio de Janeiro, Inst Quim, BR-21941972 Rio De Janeiro, RJ, Brazil
[2] Inst Militar Engn, BR-22290270 Rio De Janeiro, Brazil
[3] Univ Fed Rio de Janeiro, Inst Macromol, BR-21941972 Rio De Janeiro, RJ, Brazil
来源：
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY | 2007年 / 18卷 / 02期
关键词：
mesophase pitch; nuclear magnetic resonance; low field NMR; relaxometry;
D O I：
暂无
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Carbonaceous pitches are used as raw materials in advanced carbon products. This work aims at combining solvent extraction methodology with low field nuclear magnetic resonance relaxometry technique in order to characterize heated-treated samples of petroleum pitches. The T-1 relaxation times showed two distinct domains: one was referring to the aromatic region and the other one was attributed to mesophase. The results also evidenced that the H-1 NMR relaxometry could be used as a new tool for the characterization of this kind of system.
引用
收藏
页码：255 / 258
页数：4
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