热塑性树脂含量对CCF800H碳纤维环氧复合材料Ⅰ型层间断裂韧度的影响

doi:10.11868/j.issn.1001-4381.2016.001308

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摘要

采用国产CCF800H高强中模碳纤维增强环氧制备了复合材料，研究不同热塑性树脂含量对复合材料张开（Ⅰ）型层间断裂韧度的影响，研究表明：随着热塑组分含量的提高，复合材料的裂纹起始应变能量释放率（G_ⅠC-init）与裂纹稳态扩展应变能量释放率（G_ⅠC-prop）都获得了大幅度提升，在增韧组分质量分数大于20%时，增韧聚芳醚酰亚胺粉体可在复合材料层间富集形成层间高韧区，并在复合材料层间形成了由"连续相"和"分散相"组成的层间增韧结构。

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	钟翔屿
	张代军
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	李伟东

关键词 ：碳纤维, 热塑性树脂, 环氧, Ⅰ型层间断裂韧度

Abstract：

The toughened composite was prepared by the domestic high strength medium modulus carbon fiber (CCF800H) reinforced epoxy resin matrix. The influence of different content of toughening thermoplastic within epoxies on the mode-Ⅰ interlaminar fracture toughness (G_ⅠC) of composites was investigated. The results show the initial strain energy release rate (G_ⅠC-init) and the propagational strain energy release rate (G_ⅠC-prop) of composites improve remarkably with the increasing of content of toughening thermoplastics within epoxy matrix. In the case of mass fraction of thermoplastic is greater than 20% of epoxy, the toughening aromatic polyetherimide particle can be concentrated on the interlayer of composite to form the high interlaminar toughness zone. The interlaminar toughened structure constituted by 'continuous phase' and 'dispersion phase' is fabricated on the interlayer of composite.

Key words： carbon fiber thermoplastic epoxy mode-Ⅰinterlaminar fracture toughness

收稿日期: 2016-11-01 出版日期: 2017-08-10

中图分类号:

TQ323.5

通讯作者: 钟翔屿 E-mail: xyzhong2003@sohu.com

作者简介: 钟翔屿(1976-), 男, 高级工程师, 主要从事高性能树脂及其先进复合材料研究, 联系地址:北京市81信箱3分箱(100095), E-mail:xyzhong2003@sohu.com

引用本文:

钟翔屿, 张代军, 包建文, 李伟东. 热塑性树脂含量对CCF800H碳纤维环氧复合材料Ⅰ型层间断裂韧度的影响[J]. 材料工程, 2017, 45(8): 55-61.
Xiang-yu ZHONG, Dai-jun ZHANG, Jian-wen BAO, Wei-dong LI. Influence of Content of Toughening Thermoplastic on Mode-Ⅰ Interlaminar Fracture Toughness of Epoxy Composite Reinforced by CCF800H Carbon Fiber. Journal of Materials Engineering, 2017, 45(8): 55-61.

链接本文:

http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2016.001308 或 http://jme.biam.ac.cn/CN/Y2017/V45/I8/55

Table 1 树脂配制比例表

Fig.1 PEI-C在S-500M的溶解性实验
(a)初始状态; (b)60℃; (c)80℃; (d)100℃; (e)120℃

Fig.2 PIC/CCF800H碳纤维复合材料G_ⅠC载荷-位移曲线

Fig.3 PIC/CCF800H碳纤维复合材料G_ⅠC与裂纹长度关系曲线

Fig.4 PIC/CCF800H碳纤维复合材料Ⅰ型层间断裂韧度

Fig.5 PIC/CCF800H系列复合材料G_ⅠC试样断口形貌
(a)PIC-5；(b)PIC-10；(c)PIC-15；(d)PIC-20；(e)PIC-25；(f)PIC-30；(1) 低倍; (2) 高倍

Fig.6 G_ⅠC试样韧性结构形貌
(a)PIC-20;(b)PIC-25；(c)PIC-30；(1) 未刻蚀；(2) 刻蚀

Fig.7 PEI-C与S500M固化物的分相结构

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