Mesophase formation investigation in pitches by NMR relaxometry

Journal of the Brazilian Chemical Society

Antonio Luís Dos Santos Lima²  Angelo C. Pinto²  Rosane A. S. San Gil²  Maria Inês B. Tavares¹ 

[1] ,Universidade Federal do Rio de Janeiro Instituto de Química Rio de Janeiro RJ ,Brazil

关键词: mesophase pitch;    nuclear magnetic resonance;    low field NMR;    relaxometry;   

DOI  :  10.1590/S0103-50532007000200002

来源: SciELO

【 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 T1 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 ¹H NMR relaxometry could be used as a new tool for the characterization of this kind of system.

【 授权许可】

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