复合材料科学与工程 ›› 2024, Vol. 0 ›› Issue (2): 20-26.DOI: 10.19936/j.cnki.2096-8000.20240228.003

• 基础研究 • 上一篇    下一篇

高耐热线性环氧树脂的合成及流变特性研究

张相昌, 王钧*, 陈晞   

  1. 武汉理工大学 材料科学与工程学院,武汉 430070
  • 收稿日期:2022-12-02 出版日期:2024-02-28 发布日期:2024-04-22
  • 通讯作者: 王钧(1963—),男,博士,教授,主要从事高性能树脂基体、功能复合材料及先进复合材料工程技术方面的研究,wgdfrp@whut.edu.cn。
  • 作者简介:张相昌(1994—),男,硕士研究生,主要从事环氧树脂基复合材料方面的研究。
  • 基金资助:
    国家自然科学基金资助项目(51672201)

Synthesis and rheological properties of high heat resistant linear epoxy resin

ZHANG Xiangchang, WANG Jun*, CHEN Xi   

  1. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China
  • Received:2022-12-02 Online:2024-02-28 Published:2024-04-22

摘要: 通过N-苯基马来酰亚胺(N-PMI)与4,4′-二氨基二苯甲烷(DDM)迈克尔加成反应合成了一种改性二元胺(PDP),并与双酚A型环氧树脂(EP)反应制备了线性环氧树脂。通过核磁共振氢谱(HNMR)、红外光谱法(FTIR)和差式扫描量热法(DSC)研究了PDP的化学结构与性质,并通过DSC,FTIR和凝胶渗透色谱法(GPC)研究了线性环氧树脂耐热性(Tg)及流变特性。结果表明:随着反应时间延长,EP/PDP(1∶1摩尔比)树脂体系黏度由0.55 Pa·s增至57 Pa·s,Tg由55 ℃升至120 ℃,平均分子质量由4 651增至25 096;随着温度的降低,体系黏度由200 ℃的0.55 Pa·s增加至140 ℃的60 Pa·s。不同比例EP/PDP树脂体系的Tg随PDP过量的比例增大而升高,当EP∶PDP为0.8∶1时,Tg为121 ℃,在相同反应时间,体系黏度随PDP过量比例的增大而增大。

关键词: 改性二元胺, 线性环氧树脂, 4,4′-二氨基二苯甲烷, N-苯基马来酰亚胺, 复合材料

Abstract: A modified binary amine (PDP) was synthesized by the Michael addition reaction of N-phenylmaleimide (N-PMI) with 4,4′-diaminodiphenyl methane (DDM), and the linear epoxy resin was prepared by the reaction with bisphenol A epoxy resin. The chemical structure and properties of PDP were studied by hydrogen magnetic resonance spectroscopy (HNMR), infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC). The thermal resistance (Tg) and rheological properties of linear epoxy resin were studied by DSC, FTIR and gel permeation chromatography (GPC). The results showed that the viscosity of EP/PDP(1∶1 molar ratio) resin system increased from 0.55 Pa·s to 57 Pa·s with the extension of reaction time, while Tg increased from 55 ℃ to 120 ℃, ant the average molecular weight increased from 4 651 to 25 096. With the decrease of temperature, the viscosity of the system increases from 0.55 Pa·s at 200 ℃ to 60 Pa·s at 140 ℃. The Tg of EP/PDP resin system with different proportions increased with the increase of PDP excess ratio. When EP∶PDP was 0.8∶1, Tg was 121 ℃. At the same reaction time, the viscosity of the system increased with the increase of PDP excess ratio.

Key words: modified diamine, linear epoxy resin, 4,4′-diaminodiphenyl methane, N-phenyl maleimide, composites

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