改性环氧胶粘剂合成、固化机理的研究

STUDY ON THE SYNTHESIS OF MODIFIED EPOXY RESIN ADHESIVE AND ITS CURING MECHANISM

1.
Aero-Space Industry Corporation, Research Institute of Materials and Technology

摘要

摘要: 用福里埃变换红外光谱可获得化学变化的有用信息.在光谱上新吸收带的产生或强度增加,旧吸收带的消失或强度减弱与改性环氧树脂的合成及固化反应有关.本文旨在以红外吸收带的频率和强度变化,解释判断反应机理.在改性环氧树脂的制备中,─NCO吸收的减小,羰基吸收的增加是环氧和聚氨酯预聚体中的基团反应的结果.1670cm^-1弱吸收带的出现说明有脲基甲酸酯生成.可以观察到:在室温二天固化的环氧树脂光谱中,915cm^-1吸收消失,3055cm^-1吸收减弱.改性环氧树脂分别在80℃和100℃固化几小时,光谱变得复杂.在等温固化过程中1670cm^-1和1640cm^-1吸收的增加表明可能有氨解反应发生.
- 红外分析 /
- 改性环氧树脂 /
- 合成机理 /
- 固化机理
Abstract: The appearance or intensity increasing of new absorption bands and the disappearance or intensity lowering of original absorption bands might be expected to run parallel to the synthesis and curing reactions of the modified epoxy resin.Fourier transform infra-red analysis is used to obtasn useful information on chemical changes.This paper is primarily concerned to explain the changes of the frequencies and intensities of IR absorption bands for assessing the reaction mechanisms.
- Infra-red analysis /
- modified epoxy resin /
- synthesis mechanism /
- curing mechanism