Online Infrared Reaction Process Monitoring of Room Temperature Catalytic Curing of GAP

doi:10.12382/bgxb.2024.0631

Abstract

Abstract:

The online infrared spectroscopy technology is used to monitor the catalytic reaction process of glycidyl azide polymer (GAP) and 2,2-ethynylpropylmalonic acid dimethyl ester (DDPM) at room temperature with molar ratios of 1∶1, 1∶2, 1∶4 and 1∶5. The experimental results show that the characteristic peak intensity of azide group represented at 2101cm^-1 trends to decrease during the reaction process, and the intensity of N=N characteristic peak represented at 1285cm^-1 and 1316cm^-1 trends to increase,indicating the consumption of azide group and the generation of triazole.

Key words: GAP, online infrared spectroscopy, reaction process, catalysis

CLC Number:

TQ430.1

ZHANG Pengcheng, LIU Yan, ZHANG Xinggao, PENG Wenlian, LIU Feng, LIU Haifeng. Online Infrared Reaction Process Monitoring of Room Temperature Catalytic Curing of GAP[J]. Acta Armamentarii, 2024, 45(S1): 343-348.

Figures/Tables 6

Fig.1 GAP structure diagram and Huisgen cycloaddition reaction mechanism

Table 1 Online infrared monitoring of the amount of each raw material used

GAP、 DDPM 摩尔比	GAP/g	DDPM/g	THF/ml	CuCl/g	检测时间/h
1∶1	9.6	0.5	80	0.5	28
1∶2	6.5	0.67	80	0.36	24
1∶3	6.88	1.07	80	0.39	24
1∶4	8.00	1.67	80	0.5	24
1∶5	7.68	2	80	0.43	14

Fig.2 Online infrared absorption spectra of THF solution, and THF solutions of GAP and DDPM

Fig.3 3D online infrared absorption spectra of peaks and variation trend of online infrared absorption peak intensityat 2101cm-1 at different molar ratios and times

Fig.4 3D online infrared absorption spectra of peaks and variation trend of online infrared absorption peak intensity at 1316cm-1 at different molar ratios and times

Fig.5 3D online infrared absorption spectra of peaks and variation trend of online infrared absorption peak intensity at 1285cm-1 at different proportions and times

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