PAN预氧丝环化程度的定量表征

高等学校化学学报 ›› 2009, Vol. 30 ›› Issue (10): 2100.

PAN预氧丝环化程度的定量表征

高宇¹, 高忠民^1,2, 李向山³, 郭建强⁴, 温月芳⁴, 杨永岗⁴

1. 吉林大学化学学院,
2. 无机合成与制备化学国家重点实验室,
3. 材料科学与工程学院, 长春 130012;
4. 中国科学院山西煤炭化学研究所, 中国科学院炭材料重点实验室, 太原 030001

收稿日期:2009-01-09 出版日期:2009-10-10 发布日期:2009-10-10
通讯作者: 高忠民, 男, 研究员, 主要从事XRD衍射研究. E-mail: gaozm@jlu.edu.cn

PAN-based Preoxidative Fiber Cyclized Degree of Strict Quantitative Characterization

GAO Yu¹, GAO Zhong-Min^1,2*, LI Xiang-Shan³, GUO Jian-Qiang⁴, WEN Yue-Fang⁴, YANG Yong-Gang⁴

1. College of Chemistry,
2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry,
3. College of Materials Science and Engineering, Jilin University, Changchun 130012, China;
4. Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China

Received:2009-01-09 Online:2009-10-10 Published:2009-10-10
Contact: GAO Zhong-Min. E-mail: gaozm@jlu.edu.cn

摘要/Abstract

摘要：

应用恒温定长方法制备聚丙烯腈(PAN)预氧丝, 并测量该预氧丝长周期多层结构的小角X射线衍射谱. 解析图谱发现, 经不同预氧化时间所得预氧丝的长周期L均为11.7 nm; 当预氧时间从20 min增加到210 min, 预氧丝中环化结构相的体积分数X₀/L从7.9％增加到86.5％. 而应用广角X射线衍射法测得同批的预氧丝试样环化指数AI值则小很多. 因此, 用X₀/L定量表征预氧丝环化程度更为严格准确.

关键词: PAN预氧丝; 环化结构相; 环化相体积分数; 长周期X射线小角衍射

Abstract:

PAN-based preoxidative fiber was prepared under the conditions of constant temperature and fixed-length. Measurement of the preoxidative fiber needs the method of long-period multi-layer structure of small-angle X-ray scattering. Analysis of patterns show that long period L of the preoxidative fiber gotten by the different preoxidation time is average 11.7 nm; preoxidation time ranges from 20 min to 210 min, the volume fraction X₀ /L of the cyclization phase volume fraction increases from 7.9% to 86.5%. However, AI values of cyclization index of the preoxidative fiber sample of the same batch, measured through the wide-angle X-ray scattering method, are much more smaller. It is more exact for using X₀/L to characterize the degree of cyclization of pre-oxygen wire quantitatively.

Key words: PAN-based preoxidative fiber; Cyclization structure phase; Cyclization phase volume fraction; Long-period small-angle X-ray scattering

TrendMD:

高宇, 高忠民, 李向山, 郭建强, 温月芳, 杨永岗. PAN预氧丝环化程度的定量表征. 高等学校化学学报, 2009, 30(10): 2100.

GAO Yu, GAO Zhong-Min*, LI Xiang-Shan, GUO Jian-Qiang, WEN Yue-Fang, .... PAN-based Preoxidative Fiber Cyclized Degree of Strict Quantitative Characterization. Chem. J. Chinese Universities, 2009, 30(10): 2100.