高等学校化学学报 ›› 2005, Vol. 26 ›› Issue (12): 2377.

• 研究论文 • 上一篇    下一篇

原位FTIR光谱法研究联萘基环氧树脂体系的固化反应

许凯,陈鸣才,张秀菊,刘红波   

  1. 中国科学院广州化学研究所电子有机聚合物材料重点实验室,广州510650
  • 收稿日期:2005-01-07 出版日期:1905-03-14 发布日期:1905-03-14
  • 通讯作者: 许凯(1965年出生),男,博士,副研究员,主要从事高分子化学研究.E-mail:xk@gic.ac.cn
  • 基金资助:

    广东省重大科技专项课题(批准号:A1060502)资助.

In Situ FTIR Spectroscopic Investigation on the Curing Reaction of Binaphthyl Epoxy Systems  

XU Kai*, CHEN Ming-Cai, ZHANG Xiu-Ju, LIU Hong-Bo   

  1. Laboratory of Polymer Materials for Electronics, Guangzhou Institute of Chemistry, Chinese Academy of Sciences, Guangzhou 510650, China
  • Received:2005-01-07 Online:1905-03-14 Published:1905-03-14
  • Contact: XU Kai;E-mail:xk@gic.ac.cn

摘要:

用原位FTIR光谱方法分析了联萘基环氧单体DGEBN与胺类和酚类固化剂的固化反应.固化体系中,在环氧与固化剂混合之后和反应之前就存在特殊的分子间作用力(包括氢键作用),这可能是由环氧-固化剂产生的环状中间体络合物使环氧基的伸缩振动频率产生红移所致.随着固化反应的进行,环氧基的振动吸收峰分裂成二重峰,分裂转变时间所对应的转化度接近理论凝胶点.4种固化剂与DGEBN进行固化反应表现出不同的反应活性.用FTIR和DSC两种方法分别得到的转化度随时间的变化关系具有可比性.

关键词: 联萘环氧单体;原位FTIR光谱;固化, 联萘环氧单体, 原位FTIR光谱, 固化

Abstract:

An investigation on the curing reactions of 2,2′-diglycidyl-1,1′-binaphthyl (DGEBN) systems containing amino and phenolic hardeners was carried out by in situ Fourier transform infrared (FTIR) spectroscopy. The shifts in frequency of epoxy stretching vibration to lower values in the uncured systems suggest the existences of specific intermolecular interactions, including hydrogen bonding by solvent-mixing the cure formulations. The hydrogen-bonded intermediate complexes consisting of epoxy and the reactive groups of hardeners were thought to include cyclic structures. As the reactions progressed, a new peak emerged between 914-916  cm-1, which is associated with “free” epoxy groups. This emergence is related to the theoretical gel point. The four hardeners showed different reactivities towards DGEBN. The kinetic analysis derived from FTIR data was in good agreement with the result obtained by DSC method.

Key words: Binaphthyl epoxy monomer; In situ FTIR; Curing, Binaphthyl epoxy monomer, In situ FTIR, Curing

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