CIMS论文的天地

 

SKIN-CORE STRUCTURE IN MESOPHASE PITCH-BASED CARBON FIBERS: CAUSES AND PREVENTION

注意:本论文已在Carbon, Vol. 36, No. 12, pp. 1719–1724, 1998发表
使用者请注明论文出处

YONG-GEN LU¨(吕永根) ,a,* DONG WU,b QING-FANG ZHA,a LANG LIU¨ a and
CHANG-LING YANGa
aInstitute of Coal Chemistry, Chinese Academy of Sciences, Shanxi, 030001 Taiyuan,
People's Republic of China
bDepartment of Chemical Engineering, Taiyuan University of Science and Technology, Shanxi,
030001 Taiyuan, People's Republic of China


Abstract:To prohibit skin-core structure from appearing in mesophase pitch based carbon fiber (CF) with a large diameter (30–50 mm), measures such as decreasing oxidation temperature, prolonging holding time and increasing the oxygen partial pressure in the oxidative atmosphere were taken. EPMA (electron probe X-ray micro-analyzer) was utilized to detect the oxygen content distribution along the diameter of oxidized pitch fiber (OF). The transverse structure of OFs and CFs was observed under a scanning electron microscope (SEM). It was found with certainty that the skin-core structure in CFs is caused by steep oxygen content gradient along the diameter of their OFs. The oxygen distribution in
OFs was controlled by the oxidative stabilization conditions. In this work, the CF whose precursor fiber had been oxidized at 240°C in a flow of pure oxygen for 10 hours exhibits no skin-core structure and possesses a high tensile strength. The kinetics of stabilization was also studied. It can be concluded that those factors which increase oxygen diffusion or depress oxidative reaction are effective in overcoming skin-core structure in CFs. ? 1998 Elsevier Science Ltd. All rights reserved.
Key words:A. Carbon fibers, mesphase, B. EPMA, D. Diffusion.

1浏览PDF格式全文需要使用软件--Abode Acrobat(由于软件较大并常见,我站不提供下载)

2、下载论文全文请点击鼠标右键“另存为”或使用断点续传软件下载(358KB)


本站收录的本文作者的其他论文:

1、Preparation of Porous Carbon Microspheres

2、Preparation of mesocarbon microbeads from coal tar

3、用称重法研究聚丙烯腈树脂的凝固过程

 更多相关论文请点击本站的<<<站内全文搜索>>>查找

 

欢迎您参加讨论,发表您对此论文及其研究领域的看法!
(请在发言时在标题中使用所点评的论文的题目或研究方向,这样方便大家浏览!)

返回首页 | CIMS论文 | 并行工程 | 虚拟制造 | 敏捷制造 | 其他论文 | 项目开发 | 学术资源 | 站内全文搜索 | 免费论文网站大全 |

line.gif (4535 字节)

为了更好的为大家服务,欢迎您参加本站的投票调查

>>>>参加更多投票调查请点击!

本站永久域名:http://www.cimspaper.com欢迎访问

注意:本站内容未经书面允许不得转载

All rights reserved, all contents copyright 2000-2019
本站自2000年3月总网页访问量为