Quantitative Analysis of Curing Mechanisms of Epoxy Resin by Mid- and Near- Fourier Transform Infra Red Spectroscopy

Abstract

This article informs the essence of major work done by a number of researchers on the analysis of two-step curing mechanism of diglycidyl ether of bisphenol A (DGEBA) epoxy resin in presence of amine curing agents using near-and mid-IR technology. Various peaks used as a marker for resin formation are discussed and their implementation is comprehensively studied. In addition to this, a wide range of information about the importance of reference peaks in both near-IR (NIR) and mid-IR (MIR) regions are congregated and their accuracy is audited. Also discrepancies observed by researchers in epoxy conversion (α) in NIR and MIR regions are reviewed to highlight the comparative advantages of both regions, one over the other.

Neutron irradiation tests on B4C/epoxy composite for neutron shielding application and the parameters assay

“…7(a). In this figure, the broad band at 3500 cm -1 is assigned to O-H stretching of hydroxyl groups (Cholake et al, 2014), revealing the presence of high molecular weight of bisphenol A. The peaks lying between 2966 and 2865 cm -1 can be assigned to the methylene group (Pavia et al, 2008).…”

“…The peaks lying between 2966 and 2865 cm -1 can be assigned to the methylene group (Pavia et al, 2008). The characteristic absorption sharp band at ~ 3050 cm -1 and 915 cm -1 is due to the oxirane ring (Cholake et al, 2014;Poisson et al, 1996). The other reference peaks such as 830 cm -1 (Poisson et al, 1996;Smith et al, 1984), 1035 cm -1 (Abenojar et al, 2011), 1183 cm -1 (Nikolic et al, 2010), 1509 cm -1 (Fraga et al, 2008;Smith et al, 1984) and…”

Analyzing the network formation and curing kinetics of epoxy resins by in situ near-infrared measurements with variable heating rates

“…In the NIR region bands are often difficult to evaluate due to mode coupling and overtones, hence MIR spectroscopy is often preferred to analyse chemical composition. However, particularly for investigating the curing of epoxy resins it turns out that the sharpness and unambiguousness of the characteristic absorption peaks in the NIR are more reliable [4,22,33]. In 1963 Dannenberg et al pioneered the NIR region for the quantitative analysis of epoxy resins [34].…”

Ultrasound aided smooth dispensing for high viscoelastic epoxy in microelectronic packaging

“…Peaks and their corresponding functional groups are listed in Table 1. The peaks at 915 and 1132 cm À1 that are attributed to the epoxy rings [32][33][34] are also presented in processed samples and their intensities had not significantly changed. So are other peaks.…”