Enhancing the oxidative stabilization of isotropic pitch precursors prepared through the co-carbonization of ethylene bottom oil and polyvinyl chloride

Jinchang Liu, Hiroki Shimanoe, Koji Nakabayashi, Jin Miyawaki, Jong Eun Choi, Young Pyo Jeon, Seong-Ho Yoon

Research output: Contribution to journalArticle

Abstract

An isotropic pitch precursor for fabricating carbon fibres was prepared by co-carbonization of ethylene bottom oil (EBO) and polyvinyl chloride (PVC). Various pre-treatments of EBO and PVC, and a high heating rate of 3 °C/min with no holding time, were evaluated for their effects on the oxidative stabilization process and the mechanical stability of the resulting fibres. Our stabilization process enhanced the volatilization, oxidative reaction and decomposition properties of the precursor pitch, while the addition of PVC both decreased the onset time and accelerated the oxidative reaction. Aliphatic carbon groups played a critical role in stabilization. Microstructural characterization indicated that these were first oxidised to carbon–oxygen single bonds and then converted to carbon–oxygen double bonds. Due to the higher heating rate and lack of a holding step during processing, the resulting thermoplastic fibers did not completely convert to thermoset materials, allowing partially melted, adjacent fibres to fuse. Fiber surfaces were smooth and homogeneous. Of the various methods evaluated herein, carbon fibers derived from pressure-treated EBO and PVC exhibited the highest tensile strength. This work shows that enhancing the naphthenic component of a pitch precursor through the co-carbonization of pre-treated EBO with PVC improves the oxidative properties of the resulting carbon fibers.

Original languageEnglish
Pages (from-to)358-364
Number of pages7
JournalJournal of Industrial and Engineering Chemistry
Volume67
DOIs
Publication statusPublished - Nov 25 2018

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Carbonization
Polyvinyl Chloride
Polyvinyl chlorides
Ethylene
Oils
Stabilization
Carbon fibers
Fibers
Heating rate
Mechanical stability
Thermosets
Electric fuses
Vaporization
Thermoplastics
Tensile strength
Carbon
ethylene
Decomposition
Processing
carbon fiber

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)

Cite this

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abstract = "An isotropic pitch precursor for fabricating carbon fibres was prepared by co-carbonization of ethylene bottom oil (EBO) and polyvinyl chloride (PVC). Various pre-treatments of EBO and PVC, and a high heating rate of 3 °C/min with no holding time, were evaluated for their effects on the oxidative stabilization process and the mechanical stability of the resulting fibres. Our stabilization process enhanced the volatilization, oxidative reaction and decomposition properties of the precursor pitch, while the addition of PVC both decreased the onset time and accelerated the oxidative reaction. Aliphatic carbon groups played a critical role in stabilization. Microstructural characterization indicated that these were first oxidised to carbon–oxygen single bonds and then converted to carbon–oxygen double bonds. Due to the higher heating rate and lack of a holding step during processing, the resulting thermoplastic fibers did not completely convert to thermoset materials, allowing partially melted, adjacent fibres to fuse. Fiber surfaces were smooth and homogeneous. Of the various methods evaluated herein, carbon fibers derived from pressure-treated EBO and PVC exhibited the highest tensile strength. This work shows that enhancing the naphthenic component of a pitch precursor through the co-carbonization of pre-treated EBO with PVC improves the oxidative properties of the resulting carbon fibers.",
author = "Jinchang Liu and Hiroki Shimanoe and Koji Nakabayashi and Jin Miyawaki and Choi, {Jong Eun} and Jeon, {Young Pyo} and Seong-Ho Yoon",
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T1 - Enhancing the oxidative stabilization of isotropic pitch precursors prepared through the co-carbonization of ethylene bottom oil and polyvinyl chloride

AU - Liu, Jinchang

AU - Shimanoe, Hiroki

AU - Nakabayashi, Koji

AU - Miyawaki, Jin

AU - Choi, Jong Eun

AU - Jeon, Young Pyo

AU - Yoon, Seong-Ho

PY - 2018/11/25

Y1 - 2018/11/25

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