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221 results on '"Huo, Jichuan"'

20. Evaluation on Curing Properties and Kinetics of Isophthalonitrile Oxide

Author

Fan Yaqin, Tang Chunlan, Hu Qing, Lei Yonglin, and Huo Jichuan

Subjects
n,n-dihydroxybenzene-1,3-dicarboximidoyl dichloride, kinetics, elastomer, synthesis, 1,3-dipolar cycloaddition, Chemistry, QD1-999
Abstract

N,N-dihydroxybenzene-1,3-dicarboximidoyl dichloride was synthesized from benzene-1,3-dicarboxaldehyde and characterized by fourier transform infrared spectroscopy (FT-IR) and nuclear magnetic resonance (1H and 13C NMR). The elastomer was prepared through the 1,3-dipolar cycloaddition of reaction between liquid polybutadiene (LPB) and isophthalonitrile oxide in this work. The tensile strength of different elastomer was enhanced from 0.14 MPa to 0.33 MPa as the elongation at break decreased from 145% to 73%, and the modulus increased from 0.09 kPa to 0.47 kPa. The parameters of kinetic indicated that the curing reaction was fi rst order reaction and the apparent activation energy of each curing system was less than 10.10 kJ/mol when the content of N,N-dihydroxybenzene-1,3- dicarboximidoyl dichloride was increased from 7% to 12%. These results suggested that nitrile oxides achieved curing of polymer binders at room temperature and this work had defi nite guiding signifi cance for the application of nitrile oxides in polymer binders.

Published
2018
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49. Effect of P 2 O 5 and Na 2 O on the Solubility of Molybdenum and Structural Features in Borosilicate Glass.

Author

Liu, Hao, Zhu, Yongchang, Huo, Jichuan, Cui, Zhu, Zhang, Xingquan, Jiang, Qin, Yang, Debo, and Meng, Baojian

Subjects
BOROSILICATES, MOLYBDENUM, NUCLEAR magnetic resonance, SOLUBILITY, CRYSTALLIZATION kinetics, MOLYBDENUM ions, DOPING agents (Chemistry)
Abstract

In this paper, the effect of doping phosphorus in a borosilicate glass matrix to improve the solubility of Mo was investigated by X-ray diffraction (XRD), Raman, and solid-state nuclear magnetic resonance (NMR) spectroscopy, and the effectiveness of Na content on P species inhibiting the growth of the crystallization of Mo was assessed. The results indicate that phosphate-doped borosilicate glass can host 4 mol% of Mo, and that such a borosilicate glass matrix could only accommodate 1 mol% of Mo without phosphate doping. The effectiveness of phosphorus may be correlated with the Na content in borosilicate glass, and a high Na content borosilicate glass matrix requires more P doping to accommodate Mo. In addition, incorporating large amounts of P can compromise the aqueous durability of the glass matrix. [ABSTRACT FROM AUTHOR]

Published
2022
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50. Crystallization Kinetics of Modified Basalt Glass

Author

Baogang Guo, Zhang Kaijun, Zou Yanhui, Guilu Qin, Kang Ming, Huo Yonglin, Huo Jichuan, Xingquan Zhang, and Li Jun

Subjects
Materials science, Scanning electron microscope, basalt glass, Activation energy, crystal growth index, lcsh:Technology, Article, law.invention, Differential scanning calorimetry, law, Phase (matter), General Materials Science, Thermal stability, crystallization activation energy, crystallization kinetics, Crystallization, lcsh:Microscopy, lcsh:QC120-168.85, Basalt, lcsh:QH201-278.5, lcsh:T, crystalline phase, Chemical engineering, lcsh:TA1-2040, Basalt fiber, lcsh:Descriptive and experimental mechanics, lcsh:Electrical engineering. Electronics. Nuclear engineering, lcsh:Engineering (General). Civil engineering (General), lcsh:TK1-9971
Abstract

As the raw material for the production of basalt continuous fibers in Sichuan, basalt glass (BG) and modified basalt glass (MBG) were prepared by the melt quenching method with the basalt and chemically modified basalt, respectively. The crystallization kinetics of BG and MBG were investigated by differential scanning calorimetry (DSC) according to Kissinger methods. The results revealed that it is difficult for both glasses to crystallize at a high temperature. In addition, the crystallization activation energy of MBG is much higher than that of BG, which indicates that MBG is more difficult to crystallize than BG. The crystalline phases seemed to be formed from the surface of the two glasses. The morphologies and crystal structure of the crystalline phases in the heat-treated BG and MBG were analyzed by scanning electron microscope (SEM/EDX) and XRD. It was found that only a small amount of crystalline phase can be observed in the MBG, which indicates that the crystallization ability of the MBG was greatly suppressed. Results of this initial investigation indicate that chemical modification can effectively suppress the crystallization tendency of basalt glass and improve its thermal stability, which opens up an effective way for the industrial scale and stable production of basalt fiber.

Published
2020

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