高软化点各向同性沥青结构解析及热稳定性分析
Structural Analysis and Thermal Stability of Isotropic Pitch with High Softening Point
焦亚平 1李臣泽 1徐维哲 1宋乐春 1韩照明1
作者信息
- 1. 中石化(大连)石油化工研究院有限公司,辽宁 大连 116045
- 折叠
摘要
高软化点各向同性沥青(HTIP)在石墨电极改性及制备硬碳材料等方面有着广泛的应用.采用改进的Brown-Lander法解析了高软化点各向同性沥青甲苯可溶物(HTIP-TS)的平均结构参数,构建了符合其结构参数的平均分子结构模型,HTIP-TS主要由缩合芳环构成,芳环周边存在短侧链,分子内部存在联苯结构.利用FT-IR分析获取HTIP的红外光谱,并通过分峰拟合计算了其芳香性指数和支链化指数;通过对XRD分析结果的分峰拟合,计算了HTIP的微晶结构参数.利用TG技术对HTIP的热稳定性进行了分析,并将微观组成结构与其热稳定性进行了联系.
Abstract
Isotropic pitch with high softening point(HTIP)has a wide range of applications in graphite electrode modification and preparation of hard carbon materials.In this paper,the improved Brown-Lander method was used to analyze the average structural parameters of toluene soluble of HTIP,and the average molecular structure model conforming to the structural parameters was constructed.HTIP-TS is mainly composed of condensed aromatic rings,with short side chains around the aromatic rings and biphenyl structure inside the molecule.The infrared spectrum of HTIP was obtained by FT-IR analysis,and its aromaticity index and branching index were calculated by peak fitting.The microcrystalline structure parameters of HTIP were calculated by peak fitting of XRD analysis result.The thermal stability of HTIP was analyzed by TG technique,and the microstructure was related to its thermal stability.
关键词
沥青/各向同性/高软化点/平均分子结构/红外/X射线衍射/热重Key words
Pitch/Isotropic/High softening point/Average molecular structure/FT-IR/XRD/TG引用本文复制引用
出版年
2024
NETL
NSTL
万方数据