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  • 11
    Electronic Resource
    Electronic Resource
    Phase behaviors of poly(oxyethylene)-grafted polypropylene copolymers (2000)
    Springer
    Journal of polymer research 7 (2000), S. 21-28 
    Details
    ISSN: 1572-8935
    Keywords: Polypropylene-g-maleic anhydride ; poly(oxyethylene) ; phase behavior ; crystallinity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract A family of amphiphilic graft copolymers were prepared from a maleated polypropylene (PP-g-MA) and various crystalline poly(oxyethylene)-segmented amines of 1000 to 3000 molecular weight. Structurally, these copolymers consist of polypropylene (PP) backbone and several crystalline poly(oxyethylene) (POE) pendants in the structure. In the observation of their phase behaviors by using a differential scanning calorimeter (DSC), the interference between the POE segments and PP backbone was found. In a particular case (PP-g-MA/ED-2001), the heat of POE crystallization did not show off in the cooling curve of the DSC, but appeared during the consecutive heating process. Generally, heating and cooling patterns of the DSC analyses showed the shifts of melting and crystallizing temperatures, depending on the length and the termini of POE, from those of the starting materials— PP-g-MA and POE amines. The TGA and optical microscopy observation further supported the DSC analyses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s10965-006-0100-5
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  • 12
    Electronic Resource
    Electronic Resource
    Preparation and Characterization of Porous Silica Obtained by Hydrochloric Acid Selective Leaching Metakaolinite (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 368-372 (Feb. 2008), p. 342-344 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Porous silica was prepared by selective leaching of metakaolinite with 20 mass% HCl solution.The metakaolinite was derived from the 1:1 layered structure clay mineral kaolinite by firing at 600°C for24 h. The characteristics of porous silica were studied. The content of Al2O3 in metakaolinite was sharplychanged from 45% to less than 2% after 2 h leaching. The maximum specific surface area of the leachedsample was about 350 m2/g. The average pore size is about 2 nm. The total pore volume is 0.3 ml/g. Thelayer structure of kaolinite and metakaolinite is responsible for forming micropores
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.342.pdf
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  • 13
    Electronic Resource
    Electronic Resource
    The Spectroscopy Characterization of Kaolinite-Organic Intercalation Materials (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 353-358 (Sept. 2007), p. 1362-1365 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Kaolinite/formamide intercalation materials are characterized using X-ray diffraction(XRD), Fourier transform infrared spectroscopy(FT-IR), Raman spectroscopy and 1H magic anglespinning nuclear magnetic resonance spectroscopy (1H MAS NMR). The d(001) spacing ofkaolinite treated with formamide is 1.020nm, which is larger than that of the original clay. The 1HMAS NMR graphs show that the proton chemical shifts of the inner hydroxyl and inner surfacehydroxyl of kaolinte are δ-1.3 and δ2.4 respectively. After formamide intercalation, the protonpeaks of the inner surface hydroxyls shifted to high-field with δ2.3, the proton peak of the innerhydroxyl shifted to δ-0.3 toward low-field. In the hydroxyl stretching vibration region of Ramanspectrum, the formamide intercalation resulted in the decrease of the intensities of kaolinite innersurface hydroxyl bands at 3699cm-1,3682cm-1, 3665cm-1 and 3642cm-1, and the appearance ofadditional bands at 3610cm-1,3628cm-1. In the NH stretching region of FT-IR spectrum, two bandsare observed at 3336cm-1 and 3466cm-1 corresponding to the two types of the hydrogen bondsbetween formamide and kaolinite. In the carboxyl stretching region, an additional band at 1667cm-1is assigned to C=O group that bonded to the inner surface hydroxyl of kaolinite
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/55/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.353-358.1362.pdf
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  • 14
    Electronic Resource
    Electronic Resource
    Preparation and Characterization of Kaolinite-Glucose Intercalation Compound (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 368-372 (Feb. 2008), p. 1068-1070 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Kaolinite-glucose intercalation compound was synthesized by the intercalation of polarorganic big molecule dodecylamine and then displaced by glucose in the layer of kaolinite. XRD, FT-IR,TG and DSC were used to study the reaction process and the characters of the products. The resultsindicated that the basal spacing of kaolinite increased to 2.280 nm from 0.717 nm, and the hydrogenbonds were formed between dodecylamine NH and kaolinite Si-O after dodecylamine intercalation.Kaolinite-dodecylamine intercalation compound was stable below 295 °C. After displacement reactionby glucose, the basal spacing of kaolinite increased to 3.364 nm, and the intercalation rate reached 87%,the hydrogen bonds were formed between glucose C=O and kaolinite inner surface hydroxyl.Kaolinite-glucose intercalation compound was stable below 302 °C
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.1068.pdf
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  • 15
    Electronic Resource
    Electronic Resource
    Preparation and Characterization of Multilayered Mullite/Mo Functionally Gradient Materials (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 368-372 (Feb. 2008), p. 1866-1868 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Multilayered mullite/Mo cermet functionally gradient material (FGM) was fabricated througha powder stacking process and sintering in vacuum up to 1500°C. The composition distribution, microstructureand microhardness of the FGM were analyzed. The results indicated that the mullite/Mo FGMwas well densified with composite graded distribution and there was no new phase appeared. The microhardnessof the FGM increase from 467HV to 1543HV, the density from 2.919 to 7.106 g/cm3 as thecontent of mullite increase from 20% to 80%. The relative density exceeded 90% as the content of mullitereached 80%. Thermal shock test showed that the cracks passed through the joint without deflection
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.1866.pdf
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  • 16
    Electronic Resource
    Electronic Resource
    Improved Principal Component Analysis on the Comprehensive Hemocompatibility Evaluation of Biomaterials (2008)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 368-372 (Feb. 2008), p. 1231-1234 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Hemocompatibility of a biomaterial is determined by the interactions between its surface andblood. Due to the complicated action mechanism, various effective ways and the multiple affectivefactors of the hemocompatibility, a comprehensive evaluation needs to be built instead of single index.Therefore, the platelet consumption ratio of 10 kinds of biomaterials including Ti6Al4V-TiC-DLCgradient coat material was studied based on image analysis method. Combined with the kinetic clottingtime and the hemolysis ratio, the comprehensive hemocompatibility evaluation of the material is carriedout based on the improved principal component analysis. First, linear transformation of negative index iscarried out. Second, index is under a dimensionless using the logarithmic treatment, then to acquire allvariants’ principal component and their characteristic vectors. Finally, comprehensive evaluation indexof hemocompatibility is constructed. The improved principal component analysis avoids the effect ofcorrelativity among indexes during anaphase evaluation, and can more correctly maintain the originalinformation of indexes. Thus, the research provides a new idea to the comprehensive evaluation ofHemocompatibility
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/56/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.368-372.1231.pdf
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  • 17
    Electronic Resource
    Electronic Resource
    Improvement in the Sensitivity of the Response of Diamond Thin Films to X-Ray (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 1718-1721 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Due to some inferior performance of Chemical Vapor Deposition (CVD) diamond dosimeters,their applications are somewhat limited. The quality of diamond films was improved using MicrowavePlasma CVD (MWPCVD) by the modified processes such as cyclic deposition and in-situ plasmapost-treatment. The simple radiation dosimeters were fabricated in a sandwich configuration. Influence ofpurity and orientation of the diamond films on the sensitivity of the dosimeters was studied. The resultsindicate that the radiation dosimeters have high sensitivity to X-ray and the response of the devices islinear with the X-ray flux. The higher the purity of films is, the higher the resistivity and sensitivity are.The dosimeter based on [100] film has higher sensitivity than that based on [111] film. The dosimeterbased on films prepared by cyclic deposition has higher sensitivity than that based on films prepared bythe conventional deposition. The characterization of the response to X-ray also shows that in-situ oxygenplasma post-treatment leads to the higher sensitivity of dosimeters compared with in-situ nitrogen,hydrogen plasma post-treatments
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.1718.pdf
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  • 18
    Electronic Resource
    Electronic Resource
    Processing and Characterization of Carbothermal Reduction and Nitridation from Kaolinite-Polyacrylamide Intercalation Compound (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 1093-1095 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The kaolinite-polyacrylamide intercalation compound was prepared by the displacement reactionof the kaolinite-formamide intercalation precursor with acrylamide and the polymerization under140°C for 15h with the catalysis of dibenzoyl peroxide. Sialon was synthesized from kaolinite-polyacrylamideintercalation compound by carbothermal reduction and nitridation (CRN) processing at 1400°C.The kaolinite-carbon mixture and its CRN product were also prepared for the comparison with the CRNresult of intercalation compound. XRD, FT-IR, and TEM were used to characterize the phases, structureand morphology of products. In the CRN product from the intercalation compound, β′-sialon is the mainphase. And the reduction and nitridation rate from the intercalation compound was greater than that fromthe mixture. There was higher sialon phase’s content and lower mullite phase’s content in the CRNproduct from the intercalation compound than that from the mixture. The CRN processing of kaoliniteintercalation compound is a novel and effective method of sialon synthesis
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.1093.pdf
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  • 19
    Electronic Resource
    Electronic Resource
    Macro-Residual Stress in 304 Stainless Steel Coated with ZrO〈sub〉2〈/sub〉-CeO〈sub〉2〈/sub〉 Thin Films by Sol-Gel Process (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 2649-2651 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: X-ray diffraction (XRD) method to measure the residual stress existing in the metal substratesurface layer was introduced and the sol-gel ZrO2-CeO2 thin film was successfully prepared on SUS304stainless steel substrate by dip-coating process. The macro residual stress existing in metal substrate wasanalyzed by XRD. It turns out that the compressive stress existing in the metal substrate surface layerincreases with the increase of heat-treated temperature. Based on the above study, colored stainless steelsof high quality were prepared by sol-gel process
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.2649.pdf
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  • 20
    Electronic Resource
    Electronic Resource
    Assessment of the Surface Morphology of Diamond Film Based on Fractal (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 336-338 (Apr. 2007), p. 2543-2545 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: The surface morphology of film material directly affects its physical performance. It is of greatsignificance for finding out its prospective physical performance to characterize the surface morphologyof film material. It is hard to characterize them with some conventional methods. The surface morphologyof film material was described from the fractal point of view, and the dimension was correlated with theresistivity of material. The [100]-orientated diamond film was primarily investigated. The results showthat the greater the crystal grain is, the more uniform and regular the orientation is; and the more compactthe arrangement is, the greater the fractal box dimension is. Moreover, when fractal box dimensions werewithin a certain range approximately from 2.92 to 2.97, it presents positively correlative relation with thelogarithm of resistivity, Log(ρ), which resembles the Logistic curve. However, when the other dimensionsare beyond the range mentioned above, resistivity doesn’t change with the increase in dimensions offractal. This study will conduce to illustrating the relationship between the structure of crystal exemplifiedby arrangement and physical performance as well as material preparation
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.2543.pdf
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