氰酸酯改性环氧树脂复合材料的研究

玻璃钢/复合材料 ›› 2016, Vol. 0 ›› Issue (2): 79-82.

氰酸酯改性环氧树脂复合材料的研究

杨忠¹, 吴晓青^2*, 杨红娜³

1.天津工业大学材料科学与工程学院,天津300387;
2.天津工业大学先进纺织复合材料教育部重点实验室,天津300387;
3.航天合众科技发展有限公司,北京102628

收稿日期:2015-08-27 出版日期:2016-02-20 发布日期:2016-02-20
通讯作者: 吴晓青(1964-),女,博士,教授,主要从事复合材料方面的研究,wuxiaoqing501@126.com。
作者简介:杨忠(1990-),男,硕士,主要从事环氧树脂的改性研究。

STUDY ON CYANATE ESTER RESIN MODIFIED EPOXY RESIN COMPOSITE

YANG Zhong¹, WU Xiao-qing^2*, YANG Hong-na³

1.School of Material Science and Engineering, Tianjin Polytechnic University, Tianjin 300387, China
2.Key Laboratory of Advanced Textile Composite Materials of Ministry of Education,Tianjin Polytechnic University, Tianjin 300387, China
3.Aerospace Hezhong Science and Technology Co., Ltd., Beijing 102628, China

Received:2015-08-27 Online:2016-02-20 Published:2016-02-20

摘要/Abstract

摘要： 采用双酚A型二氰酸酯对环氧树脂E51进行改性,并制备出玻璃纤维增强复合材料。通过傅里叶红外光谱(FT-IR)、动态热力学分析(DMA)对不同质量比的环氧树脂/氰酸酯的共固化产物结构特征以及复合材料的玻璃化转变温度进行了研究,同时测定并讨论了对复合材料的拉伸性能、弯曲性能、吸湿性能的影响。结果表明,在环氧树脂和氰酸酯共固化体系中,随着氰酸酯含量的增加,固化物中三嗪环的相对含量增加,噁唑烷酮的相对含量降低。当环氧树脂/氰酸酯质量比为50/50时,复合材料的玻璃化转变温度为215.6℃,与未改性相比提高了49.7℃;650h后吸水率显著降低,仅为0.69%;但拉伸强度和弯曲强度略有降低。扫描电镜(SEM)分析表明,加入氰酸酯后,增加了复合材料的残余应力,使复合材料呈现出脆性断裂。

关键词: 环氧树脂, 氰酸酯, 耐热性能, 力学性能, 吸湿性能

Abstract: The epoxy resin was modified by bisphenl-A dicyanate, and the glass fiber reinforced composites were prepared. The effect of the different mass ratio epoxy resin/cyanate ester resin on the co-cured product structure and glass transition temperature were investigated by fourier transform infrared spectroscopy (FT-IR) and dynamic mechanical analysis (DMA), tensile property, flexural property and moisture absorption property of the composites were discussed. The results show that, with the increasing of the content of triazine ring, the content of oxazolidinone decreases as cyanate ester resin increases. When the mass ratio epoxy resin/cyanate ester resin is 50/50, the glass transition temperature of the composite is 215.6℃ and increases by 49.7℃compared to unmodified epoxy resin. After 650 h, water absorption is only 0.69%, but the tensile strength and flexural strength decrease slightly. Scanning electron microscopy (SEM) shows that the residual stress of composites increase with the incorporation of cyanate ester resin, and composites exhibit brittle fracture.

Key words: epoxy resin, cyanate ester resin, heat resistance, mechanical properties, moisture absorption properties

中图分类号:

TB332

杨忠, 吴晓青, 杨红娜. 氰酸酯改性环氧树脂复合材料的研究[J]. 玻璃钢/复合材料, 2016, 0(2): 79-82.

YANG Zhong, WU Xiao-qing, YANG Hong-na. STUDY ON CYANATE ESTER RESIN MODIFIED EPOXY RESIN COMPOSITE[J]. Fiber Reinforced Plastics/Composites, 2016, 0(2): 79-82.

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