高等学校化学学报

高等学校化学学报 ›› 2001, Vol. 22 ›› Issue (2): 234.

• 研究论文 • 上一篇    下一篇

碳前驱体CH3ArCH2NH2的热解性能及动力学研究

王惠1,2, 杨海峰1, 罗瑞盈3, 杨延清2, 冉新权1   

  1. 1. 西北大学化学系, 西安 710069;
    2. 西北工业大学材料科学系, 西安 710072;
    3. 北京航空航天大学, 北京 100083
  • 收稿日期:1999-08-20 出版日期:2001-02-24 发布日期:2001-02-24
  • 通讯作者: 王惠(1961年出生),女,博士,主要从事物理无机相化学及材料化学研究.E-mail:xb@pub.xaonline.com E-mail:xb@pub.xaonline.com
  • 基金资助:

    国家自然科学基金(批准号:596820070);陕西省教育委员会专项基金(批准号:99KJ100)资助

Studies on Pyrolysis Properties and Kinetics of Carbon Matrix Precursor CH3ArCH2NH2

WANG Hui1,2, YANG Hai-Feng1, LUO Rui-Ying3, YANG Yan-Qing2, RAN Xin-Quan1   

  1. 1. Department of Chemistry, Northwest University, Xi&an 710069, China;
    2. Department of Material Science, Northwestern Polytechnic University, Xi'an 710072, China;
    3. Beijing University of Aeronauticsand Astronautics, Beijing 100083, China
  • Received:1999-08-20 Online:2001-02-24 Published:2001-02-24

PDF (PC)

摘要： 通过密闭压力容器法、常压DSC、高压DSC及紫外分光光度定量分析法等实验手段,对液相沉积法制碳/碳复合材料用碳前驱体CH3ArCH2NH2的热裂解行为进行了研究,获得不同温度、不同压力下该碳前驱体的热分解温度和残碳率,用等温动力学和非等温动力学方法获得了热裂解反应的表观活化能.实验结果表明,常压热裂解温度大约为530.15～556.55K,1～3MPa的高压范围内的热裂解温度大约在618.34～675.49K;密闭压力容器中的残碳率为5623%,常压下的残碳率为28.96%～36.47%,而高压下残碳率可达591.1%;根据基辛格等方法获得了等温条件下和非等温条件下热裂解反应的表观活化能Ea分别为206.78kJ/mol和183.93kJ/mol,反应级数n≈1.

关键词: 碳/碳复合材料, 碳前驱体, 密闭压力容器法, 热裂解温度, 表观活化能

Abstract: Pyrolysis behavior of carbon matrix precursor CH3ArCH2NH2 used for preparing C/Ccomposites by rapid densification process was investigated by closed-pressure-vessel method, DSC, high-pressure DSCmethods and ultraviolet spectrophotometric method. The pyrolysis temperatures and carbon residual ratios of the compound at different temperatures and different pressures were derived and the apparent activation energy was also obtained by isothermal dynamic and non-isothermal dynamic method. The experimental results are as follows: at the atmospheric pressure, the pyrolytic temperature is about 530.15—547.15 K; at the pressure as high as 1—3 MPa, the pyrolytic temperature is about 618.34—675.49 K. The carbon residual ratios in the closed pressure vessel, at the atmospheric pressure and at a high pressure are 56.23%, 28.96%—36.47% and 59.11% respectively. Based on Kissinger's method and the result of isothermal experiment, the apparent activation energies of the pyrolysis reaction under the isothermal and non-isothermal conditions are 206.78 kJ/mol and 183.93 kJ/mol respectively, and the reaction order n≈1.

Key words: C/C composite material, Carbon matrix precursor, Closed-pressure-vessel method, Pyrolysis temperature, Pyrolytic apparent activation energy

中图分类号: 

TrendMD: