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题名: New insights into orientation distribution of high strength polyacrylonitrile-based carbon fibers with skin-core structure
作者: Guo, Xinshuang1, 4; Cheng, Yongxin1, 5; Fan, Zhen2; Feng, Zhihai2; He, LianLong1; Liu, Ruigang3; Xu, Jian3
刊名: CARBON
发表日期: 2016-11-01
卷: 109, 页:444-452
收录类别: SCI
英文摘要: The continuous changes in orientation angle (OA) across longitudinal sections of high strength polyacrylonitrile-based carbon fibers with circular cross sections were investigated by transmission electron microscopy. A contrast ring was observed in some cross-sections, displaying two contrast zones in the longitudinal section. Two types of OA distribution features were found in the absence or presence of contrast zones. Contrast zones were confirmed as the symbol of the skin-core structure and the boundaries between the skin and core. The high preferred orientation of the basal planes was first identified in the contrast zone, which presented an OA inflexion point (OIP) in the OA plot. The OIP was also detected in the contrast zone for the self-prepared carbon fibers. The OIP and contrast ring shifted towards the core as the preoxidation time increased. For a preoxidation time of 8 h, both the OIP and contrast ring disappeared. A mechanism, based on the stress-induced alignment of the basal planes, was proposed to account for the formation of the OIP. (C) 2016 The Authors. Published by Elsevier Ltd.
语种: 英语
内容类型: 期刊论文
URI标识: http://ir.iccas.ac.cn/handle/121111/35464
Appears in Collections:高分子物理与化学实验室_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China
2.Aerosp Res Inst Mat & Proc Technol, Natl Key Lab Adv Funct Composite Mat, Beijing 100076, Peoples R China
3.Chinese Acad Sci, Inst Chem, Beijing Natl Lab Mol Sci, Lab Polymer Phys & Chem, Beijing 100190, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Univ Sci & Technol China, Hefei 230026, Peoples R China
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