Application of Two-Dimensional Fourier Transform Infrared Correlation Spectroscopy on Dicyandiamide-Epoxy Network

doi:10.11944/j.issn.1000-0518.2015.11.150103

Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (11): 1275-1282.DOI: 10.11944/j.issn.1000-0518.2015.11.150103

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Application of Two-Dimensional Fourier Transform Infrared Correlation Spectroscopy on Dicyandiamide-Epoxy Network

LI Dan^a,SU Xiaosheng^a,ZHANG Chi^b^*()

^aNational Engineering Research Center of Electronic Circuits Base Materials, Shengyi Technology CO.,LTD,Dongguan,Guangdong 523808,China
^bSchool of Chemical Sciences,The University of Auckland,Auckland 1142,New Zealand

Received:2015-03-17 Accepted:2015-08-18 Published:2015-11-02 Online:2015-11-02
Contact: ZHANG Chi
Supported by:
Supported by the Strategic Core Technology Research Project of Guangdong Provincial Government(No.20110913)

Abstract

Abstract:

In-situ IR has been applied to study the curing reaction process of dicyandiamide(DICY) with epoxy resin. The combination of FTIR and its generalized two-dimensional infrared correlation spectroscopy(2D-IR) to analyze the curing reaction process can effectively enhance the spectral resolution and reveal the details about the reaction mechanism. Four reactions were detected in the resin network:(i)reversible decomposition of DICY and cyanamide; (ii)copolymerization of cyanamide and epoxy resin to form the intermediate product; (iii)copolymerization of cyanamide and the intermediate product to form imines; (iv)rearrangement of the imine structure to form the amide structure. It is very effective to explain the curing mechanism of thermosetting resin by using in-situ IR, FTIR and 2D-IR.

Key words: FTIR, two-dimensional correlation analysis, dicyandiamide, epoxy resin, curing reaction

LI Dan, SU Xiaosheng, ZHANG Chi. Application of Two-Dimensional Fourier Transform Infrared Correlation Spectroscopy on Dicyandiamide-Epoxy Network[J]. Chinese Journal of Applied Chemistry, 2015, 32(11): 1275-1282.

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Application of Two-Dimensional Fourier Transform Infrared Correlation Spectroscopy on Dicyandiamide-Epoxy Network

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