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

Abstract

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

CLC Number:

O631

TrendMD:

XU Kai, CHEN Ming-Cai, ZHANG Xiu-Ju, LIU Hong-Bo. In Situ FTIR Spectroscopic Investigation on the Curing Reaction of Binaphthyl Epoxy Systems[J]. Chem. J. Chinese Universities, 2005, 26(12): 2373.

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

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