中间相沥青纤维的预氧化和应力应变行为研究

孙祝林; 奚立华; 李红; 曾凡龙; 吕永根

中间相沥青纤维的预氧化和应力应变行为研究

东华大学材料科学与工程学院, 上海 201620

基金项目: 国家自然科学基金（51372037）.

详细信息

作者简介:
孙祝林,硕士研究生.E-mail:ycsunzhulin@163.com

通讯作者:
吕永根,研究员.E-mail:yglu@dhu.edu.cn

中图分类号: TQ342⁺.74
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- 被引次数: 0
出版历程
- 收稿日期: 2017-02-26
- 录用日期: 2017-06-28
- 修回日期: 2017-05-10
- 刊出日期: 2017-06-28

Fourier transform infrared and dynamic thermomechanical analyses of mesophase pitch fibers during oxidative stabilization

College of Material Science and engineering, Donghua University, Shanghai 201620, China

Funds: National Natural Science Foundation of China (51372037).

摘要

摘要: 采用傅里叶红外和动态热机械分析仪对中间相沥青纤维预氧化过程进行研究。结果表明，纤维中的应力在175℃前迅速降低；在氧化过程中，脱氢反应显著，同时羟基减少；到250℃以上醚键增加，大量的交联反应发生，应力增大，在恒定应力下纤维伸长速率减缓；270℃以上时纤维稳定化程度较高，产生收缩；整个氧化过程中含氧官能团的增加并不显著。结合纤维在垂直和水平两种状态下的受力分析认为，连续预氧化时，沥青纤维自身重力不容忽略，沥青预氧化炉宜采用立式设计。
- 中间相沥青纤维 /
- 氧化 /
- 交联
Abstract: The stress in and elongation of mesophase pitch fibers during oxidative stabilization were investigated by a dynamic thermo-mechanical analyzer under a fixed elongation and strainload,respectively.Their functional groups at different temperatures were characterized by Fourier transformed infrared spectroscopy.Results indicated that when the temperature was below 175℃,a distinct decrease in the stress in the fibers and the number of hydroxyl groups was found,accompanied by dehydrogenation reactions.When the temperature was increased above 250℃,the number of ether bonds and the stress increased,and elongation decreased due to cross-linking reactions.When the temperature was increased further,above 270℃,the fibers began to shrink because of the increase in the extent of stabilization.It was found,based on dynamic thermo-mechanical data,that the effect of gravity on the fiber cannot be neglected in designing a stabilization furnace and a vertical furnace is superior to a horizontal one.
- Mesophase pitch fiber /
- Pre-oxidization /
- Cross-linkage

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参考文献(21)

Brooks J D, Taylor G H. The formation of graphitizing carbons from the liquid phase[J]. Carbon, 1965, 3(2):185-193.

Taylor G H, Pennock G M, Gerald J D F, et al. Influence of QI on mesophase structure[J]. Carbon, 1993, 31(2):341-354.

Otani S. On the carbon fiber from the molten pyrolysis products[J]. Carbon, 1965, 3(1):31-38.

Otani S, Yamada K, Koitabashi T, et al. On the raw materials of MP carbon fiber[J]. Carbon, 1966, 4(3):425-432.

Oya A. Sugio Otani[J]. Carbon, 2010, 48(15):4217-4218.

Hong S, Korai Y, Mochida I. Development of mesoscopic textures in transverse cross-section of mesophase pitch-based carbon fibers[J]. Carbon, 1999, 37(6):917-930.

Hong S, Korai Y, Mochida I. Mesoscopic texture at the skin area of mesophase pitch-based carbon fiber[J]. Carbon, 2000, 38(6):805-815.

Korai Y, Hong S, Mochida I. Development of longitudinal mesoscopic textures in mesophase pitch-based carbon fibers through heat treatment[J]. Carbon, 1999, 37(2):203-211.

LU Xi-lan, ZHANG Hui-min, ZHANG De-xiang, et al. The stabilization of mesophase pitch fiber from petroleum[J]. The journal of Shanghai East China University of Science and Technology, 2002, 28(2):191-193.

Lavin J G. Chemical reactions in the stabilization of mesophase pitch based carbon fiber[J]. Carbon, 1992, 30(3):351-357.

Miura K, Nakagawa H, Hashimoto K. Examination of the oxidative stabilization reaction of the pitch-based carbon fiber through continuous measurements of oxygen chemisorption and gas formation rate[J]. Carbon, 1995, 33:275-82.

CHI Wei-dong, SHEN Zeng-min. The stabilized research of pitch from petroleum[J]. New Carbon Materials, 1995, 5:1-6.

沈曾民. 新型碳材料[M]. 北京:化学工业出版社, 2003, 126-127. (SHEN Zeng-min. New Carbon Materials[M]. Beijing:Chemical Industry Press, 2003, 126-127.)

Matsumoto T, Mochida I. A structural study on oxidative stabilization of mesophase pitch fibers derived from coal tar[J]. Carbon, 1992, 30(7):1041-1050.

H Ogawa, K Saito. Oxidation behavior of ployacrylonitrile fibers evaluated by new stabilization index[J]. Carbon, 1995, 33(16):783-788.

Liu Yao-dong, Han Gi Chae, Satish Kumar. Gel-spun carbon nanotubes/polyacrylonitrile composite fibers. Part Ⅱ:Stabilization reaction kinetics and effect of gas environment[J]. Carbon, 2011, 49(13):4487-4496.

Ogale A A, Lin C, Anderson D P, et al. Orientation and dimensional changes in mesophase pitch-based carbon fibers[J]. Carbon, 2002, 40(8):1309-1319.

Jones S P, Fain C C, Edie D D. Structural development in mesophase pitch based carbon fibers produced from naphthalene[J]. Carbon, 1997, 35(10):1533-1543.

WANG Shi-hua, REN Da-cheng. Linear carbon were prepared by dehydration and oxidative dehydrogenation reaction of polyvinyl alcohol[J]. New Carbon Materials, 2005, 20(1):8-11.

MAO Ying-peng. Melt spinning of polyvinyl alcohol[J]. Synthetic Fiber In China, 2005, 20(1):8-11.

RONG Hao-ming, WANG Pei-hua, YANG Xiao-ping. The thermo-mechanical behaviors of PAN fiber in the pre-oxidization the research of changes of shrinkage stress[J]. The journal of Shanghai East China University of Science and Technology, 1999, 26(2):33-36.

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