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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis and Biological Activities of Sulfonated Polysaccharides Having Pentofuransidic Structures (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 342-343 (July 2007), p. 721-724 
    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: In order to elucidate the relationship between the structure and biological activity such asanti-HIV and blood anticoagulant activity, sulfonated polysaccharides and amino-polysaccharideshaving pentofuranosidic structures were synthesized. These sulfonated polysaccharides had potentanti-HIV activity in spite of low molecular weights, and which was dependent on the degree ofsulfonation. For the blood anticoagulant activity, the conformation of polymer backbone andsulfamide group plays an important role on the interactions with the blood anticoagulant factor
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.342-343.721.pdf
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis and Properties of Thermotropic Main-Chain Type Liquid CrystallinePolyurethanes Containing Biphenyl Mesogen (2007)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 342-343 (July 2007), p. 729-732 
    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: A new type of thermotropic main-chain liquid crystalline polyurethanes containingbiphenyl units was synthesized by polyaddition reaction of diisocyanates such as 2,6-tolylenediisocyanate, 2,5-tolylene diisocyanate, 2,4-tolylene diisocyanate, and 1,4-phenylene diisocyanate,with 4,4′-Bis(8-hydroxyoctoxy)biphenyl (BP8). The structure of the monomer and thecorresponding polymers were confirmed using FT-IR and 1H-NMR spectroscopic methods. BP8exhibited a smectic type mesophase, however, nematic phases were found for all synthesized liquidcrystalline polyurethanes except for 1,4-phenylene diisocyanate/BP8 based polyurethane. Forexample, polyurethane 2,5-TDI/BP8 exhibited monotropic liquid crystallinity in the temperatureranging from 172 to 160 °C on the cooling stage. Properties of these polyurethanes were studied bydifferential scanning calorimetry (DSC), and optical polarizing microscopy. The FT-IR studyindicated that the hydrogen bonding among urethane linkages attributed to the mesomorphism
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/54/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.342-343.729.pdf
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    A Study on Damage Behavior and Strength of Smart Material under Low Temperature Using Acoustic Emission (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 321-323 (Oct. 2006), p. 174-177 
    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: Tensile residual stress happen by difference of coefficients of thermal expansion betweenfiber and matrix is one of the serious problems in metal matrix composite (MMC). TiNi alloy fiberwas used to solve the problem of the tensile residual stress as the reinforced material. TiNi alloy fiberimproves the tensile strength of composite by occurring compressive residual stress using shapememory effect in the matrix. A hot press method was used to create the optimal condition for thefabrication of shape memory alloy (SMA) composite. The bonding effect between the matrix and thereinforcement within the SMA composite was strengthened by the cold rolling. The fabricatedcomposite by these processes can be applied as a part of the aircraft, and this part is operated undersevere flying condition such as low temperature and high pressure. In this study, an acoustic emissiontechnique was used to quantify the microscopic damage behavior of cold rolled TiNi/Al6061 SMAcomposite at low temperature condition. The results showed that the tensile strength of theTiNi/Al6061 SMA composite increased with the TiNi reinforcement at low temperature condition,but the strength for the specimen subjected to the cold rolling decreased. AE parameters of AE counts,amplitude and energy were useful to evaluate the microscopic damage behavior of the composite
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.321-323.174.pdf
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Mechanical Property and Oxidation Behavior of LPS-SiC Materials (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 321-323 (Oct. 2006), p. 913-916 
    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 microstructure and the mechanical property of liquid phase sintered (LPS) SiCmaterials with oxide secondary phases have been investigated. The strength variation of LPS-SiCmaterials exposed at the elevated temperatures has been also examined. LPS-SiC materials weresintered at the different temperatures using two types of Al2O3/Y2O3 compositional ratio. Thecharacterization of LPS-SiC materials was investigated by means of SEM with EDS, three pointbending test and indentation test. The LPS-SiC material with a density of about 3.2 Mg/m3represented a flexural strength of about 800 MPa and a fracture toughness of about 9.0 MPa⋅√m
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.321-323.913.pdf
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Thermal Properties of a Liquid-Crystalline Polyurethanes Containing Biphenyl Mesogen (2006)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 321-323 (Oct. 2006), p. 1385-1388 
    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: A new type of thermotropic main-chain liquid crystalline polyurethanes containingbiphenyl units was synthesized by polyaddition reaction of diisocyanates such as 2,6-tolylenediisocyanate, 2,5-tolylene diisocyanate, 2,4-tolylene diisocyanate, and 1,4-phenylene diisocyanate,with 4,4′-Bis(11-hydroxyundeyloxy)biphenyl (BP11). The structure of the monomer and thecorresponding polymers were confirmed FT-IR and 1H NMR spectroscopic methods. BP11 exhibiteda smectic type mesophase, however, nematic phase was found for all synthesized liquid crystallinepolyurethanes except for 1,4-phenylene diisocyanate/BP11 based polyurethane. For example,polyurethane 2,5-TDI/BP11 exhibited monotropic liquid crystallinity in the temperature ranges from173 to 156 °C on the cooling stage
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/51/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.321-323.1385.pdf
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    Paper (German National Licenses)
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