Mesophase formation investigation in pitches by NMR relaxometry

Journal of the Brazilian Chemical Society

Instituto Militar de Engenharia, Rio de Janeiro, Brazil¹  Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil¹  Lima, Antonio Luís dos Santos¹  Gil, Rosane A. S. San¹  Pinto, Angelo C.¹  Tavares, Maria Inês B.¹ 

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

DOI  :  10.1590/S0103-50532007000200002

学科分类：化学（综合）

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】

Unknown