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Wu Y.J.,China Institute of Technology | Yang C.P.,Guizhou Academy of Analysis and Testing
Applied Mechanics and Materials | Year: 2014

In this paper, In this paper, polypropylene / mica composites were prepared by blending, using polypropylene (PP) as matrix, mica as filler. In order to study the anti-aging properties of polypropylene / mica composite materials, the above polypropylene / mica composite materials were placed outside to study the influence of natural aging time on the anti-aging properties and to explore the natural aging mechanism of polypropylene / mica composites. Natural aging research results show that: with the extension of the natural aging time the surface of materials will appear cracks and sheddings. The trends of tensile strength reduce at first, then increase and then decrease; the notched impact toughness values show fluctuating in the early aging, then an increase following and then decreasing. The increase of mica content are good for maintaining the mechanical properties of PP / mica composite, PP-g-MAH helps to maintain the tensile strength, while toughening POE-g-MAH will weaken the anti-aging properties of polypropylene / mica composite materials. © (2014) Trans Tech Publications, Switzerland.


Song G.-L.,Beijing Institute of Technology | Song G.-L.,Guizhou academy of analysis and testing | Luo Y.-J.,Beijing Institute of Technology | Li J.-Q.,Beijing Institute of Technology | And 2 more authors.
Advanced Materials Research | Year: 2014

Determination of TiOCl2 in refined TiCl4 was significant for analysis of its impurities. TiOCl2 could be determined by infrared spectroscopy due to its infrared characteristic spectrum line. However, normal infrared absorption cell was not fit for the sample analysis, because TiCl4 easily reacted with moisture in the air and immediately was hydrolyzed to form highly corrosive hydrochloric acid smoke. The infrared absorption cell with the window film of ZnSe (φ10×1mm, wavenumbers: 7800cm-1~440cm-1) and the glass cell (optical path: 22mm, 12mm, 7mm and 4mm)was assembled and utilized in determination of the TiOCl2 in refined TiCl4 by standard addition method. The detection limit of TiOCl2 was 26.5mg•kg-1, the regression equation was Y=1.0118X, R2=0.9926; With standard addition method, the regression equation of TiOCl2 was Y=1.9400X, R2=0.9940,This infrared absorption device was safe, simple and convenient, easily removable and washable, and re-useable. This method could meet the requirement of determination of TiOCl2 in refined TiCl4. © (2014) Trans Tech Publications, Switzerland.


Song G.-L.,Beijing Institute of Technology | Song G.-L.,Guizhou Academy of Analysis and Testing | Luo Y.-J.,Beijing Institute of Technology | Li J.-Q.,Beijing Institute of Technology | Tan H.,Guizhou Academy of Analysis and Testing
Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis | Year: 2015

Refined TiCl4 is the key procedure in producing titanium sponge. Besides, the content of carbon and oxygen (C and O) impurities in titanium sponge and that of C and O impurities in refined TiCl4 presents the 4-times enrichment relationship. Therefore, the content control of the C and O impurities in refined TiCl4 becomes the key part for the quality control of titanium material. In order to control the oxygen and carbon, there is the need to analyze the source of C and O impurities so that strict control can be conducted over the impurities of refined TiCl4. Determination of CO2 in refined TiCl4 was significant for analysis of its impurities. CO2 could be determined by infrared spectroscopy due to its infrared characteristic spectrum line. However, normal infrared absorption cell was not fit for the sample analysis, because TiCl4 easily reacted with moisture in the air and immediately was hydrolyzed to form highly corrosive hydrochloric acid smoke. According to Lambert-Beer Law, which means the concentration (cx) and absorbance(A)~length (L) curve's slope have direct ratio. The infrared absorption cell with the window film of ZnSe (■10 mm×1 mm, wavenumers: 7 800~440 cm-1) and the glass cell (optical path: 42, 22, 12, 7 and 4 mm) was assembled and utilized in determination of the CO2 in refined TiCl4 by standard addition method. The detection limit of CO2 was 0.92 mg·kg-1, the regression equation was Y=0.031 1X, R=0.997 2; With standard addition method, the regression equation of CO2 was Y=0.131 7X, R=0.998 6, it's good in linearity relation, the CO2 content in refined TiCl4 is determined to be 1.53 mg·kg-1 and SD up to 0.04 mg·kg-1. RSD of the method precision is between 0.53%~1.27%, while recovery rate is between 89.2%~96.8%. This infrared absorption device was safe, simple and convenient, easily removable and washable, and re-useable. The method could conduct the quantitative analysis over the CO2 content in refined TiCl4 through adding standard sample for one time, it could meet the requirement of determination of CO2 in refined TiCl4. ©, 2015, Science Press. All right reserved.

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