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

SUN Zhu-lin; XI Li-hua; LI Hong; ZENG Fan-long; LU Yong-gen

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Article Navigation > New Carbon Mater. > 2017 > 32(3): 284-288

SUN Zhu-lin, XI Li-hua, LI Hong, ZENG Fan-long, LU Yong-gen. Fourier transform infrared and dynamic thermomechanical analyses of mesophase pitch fibers during oxidative stabilization. New Carbon Mater., 2017, 32(3): 284-288.

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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).

Received Date: 2017-02-26
Accepted Date: 2017-06-28
Rev Recd Date: 2017-05-10
Publish Date: 2017-06-28

Abstract

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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References(21)

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