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Shigui Zhao

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Organization: Shandong University
Department: School of Materials Science and Engineering
Title:
Effect of yttrium phosphate on irradiation of methyl vinyl silicone rubber
Co-reporter:Depeng Ma, Lianfeng Wu, Shengyu Feng, Haifeng Lu, Shigui Zhao
Radiation Physics and Chemistry 2017 Volume 136(Volume 136) pp:
Publication Date(Web):1 July 2017
DOI:10.1016/j.radphyschem.2017.03.024
•A new method to prepare silicone rubber of irradiation resistance.•YPO4 improve the irradiation resistance of the YPO4/MVQ rubber nanocomposites.•YPO4:0.05Eu3+ and YPO4:0.05Tb3+ explain the irradiation protection mechanism.Nanoscale Yttrium phosphate (YPO4) particles was prepared by hydrothermal method, and was used as anti-radiation additive for methyl vinyl silicone rubber (MVQ rubber). The mechanical properties and crosslink density of YPO4/MVQ rubber nanocomposites before and after irradiated by γ-rays were determined. The irradiation protection mechanism of YPO4 was discussed using the fluorescence spectra. The results showed that YPO4 could improve the irradiation-resistant properties of silicone rubber.
Kinetic Study of Alkoxysilane Hydrolysis under Acidic Conditions by Fourier Transform Near Infrared Spectroscopy Combined with Partial Least-Squares Model
Co-reporter:Qianqian Zhai, Chuanjian Zhou, Shigui Zhao, Cun Peng, and Yingchao Han
Industrial & Engineering Chemistry Research 2014 Volume 53(Issue 35) pp:13598-13609
Publication Date(Web):August 19, 2014
DOI:10.1021/ie5012195
Fourier transform near-infrared (FT-NIR) spectroscopy combined with a partial least-squares (PLS) model was successfully employed to study the hydrolysis kinetics of dimethyldiethoxysilane, methyltriethoxysilane, and tetraethoxysilane in an acid-catalyzed EtOH system. The high scanning speed and high sensitivity of FT-NIR spectroscopy enabled the new method to catch the rapid changes of the H2O and EtOH concentrations without delay, allowing the kinetic behaviors of the hydrolysis reactions of the specified alkoxysilanes to be investigated. The hydrolysis processes were found to follow second-order reactions. The hydrolysis rate constants, activation energies, and Arrhenius frequency factors were obtained. The FT-NIR PLS results were in good agreement with those determined by Fourier transform midinfrared spectroscopy. However, the FT-NIR PLS method was found to be more accurate, because of the powerful data processing ability of PLS. All of the results suggest that the FT-NIR PLS model is a valuable tool for performing kinetic research.
Determination of the SiH content of hydrogen silicone oil by a combination of the fourier transform near infrared, attenuated total reflectancefourier transform infrared, and partial least squares regression models
Co-reporter:Qianqian Zhai;Chuanjian Zhou;Wenjie Li ;Cun Peng
Journal of Applied Polymer Science 2014 Volume 131( Issue 17) pp:
Publication Date(Web):
DOI:10.1002/app.40694

ABSTRACT

To verify the feasibility of the determination of the SiH content (HC) of hydrogen silicone oil (HS-oil) with Fourier transform near infrared (FT-NIR) spectroscopy and attenuated total reflectance (ATR)–Fourier transform infrared (FTIR) spectroscopy combined with the partial least squares regression (PLS-R) model, HS-oil samples were synthesized from concentrated hydrosilicone oil (HC = 1.4 wt %), octamethylcyclotetrasiloxane, and hexamethyldisiloxane or prepared by the dilution of concentrated hydrosilicone oil with octamethylcyclotetrasiloxane. The FT-NIR PLS-R model (8695–4000 cm−1, two principal components) was developed from the FT-NIR spectral data, and the coefficient of determination for cross-validation (R2) and the coefficient of determination for external validation (r2) were 0.992 and 0.995, respectively. The ATR–FTIR PLS-R model (2302–2040 cm−1, one principal component) was developed from the ATR–FTIR spectral data; it produced an R2 of 0.995 and an r2 of 0.996. This study demonstrated that the combination of FT-NIR and ATR–FTIR spectroscopy with the PLS-R model were successfully used to determine the HC of the HS-oil. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40694.

Investigation of allyl-capped carbosilane dendrimers used as crosslinker for silicone rubber
Co-reporter:Chuanjian Zhou;Jianming Zhang;Jin Wang;Shengyu Feng
Journal of Applied Polymer Science 2006 Volume 100(Issue 3) pp:1772-1775
Publication Date(Web):24 JAN 2006
DOI:10.1002/app.23034

High-temperature vulcanized silicone rubber was prepared by using allyl-capped carbosilane dendrimers, in which the core molecules were Si(CH2CHCH2)4 and Ph2Si(CH2CHCH2)2 as crosslinker and nanoscale reinforcing filler, respectively. Allyl-capped carbosilane dendrimers improved the mechanical properties of silicone rubber. The optimum tensile strength and tear strength were 9.6 MPa and 31.0 kN/m, respectively, when using SiGn(allyl)m as the crosslinker and 10.1 MPa and 32.0 kN/m, respectively, when using Ph2SiGn(allyl)m as the crosslinker. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 1772–1775, 2006

1H-Benz[de]isoquinoline-1,3(2H)-dione, 2-butyl-6-[2-(trimethylsilyl)ethynyl]-
1H-Benz[de]isoquinoline-1,3(2H)-dione, 2-butyl-6-[2-(trimethylsilyl)ethynyl]-
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1H-Benz[de]isoquinoline-1,3(2H)-dione, 2-butyl-6-[2-(trimethylsilyl)ethynyl]-
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Pseudowollastonite(Ca(SiO3)) (9CI)
Pseudowollastonite(Ca(SiO3)) (9CI)
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