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  • Articles  (49)
  • 1985-1989  (49)
  • Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics  (49)
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  • Articles  (49)
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  • 1
    Electronic Resource
    Electronic Resource
    Preparation of wavelength-selective reflectors by sol-gel processing (1987)
    Springer
    Journal of materials science 6 (1987), S. 1481-1482 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01689330
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  • 2
    Electronic Resource
    Electronic Resource
    A sol-gel-derived antireflective coating on optical glass for near-infrared applications (1989)
    Springer
    Journal of materials science 8 (1989), S. 1436-1437 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00720215
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  • 3
    Electronic Resource
    Electronic Resource
    Unified study of the different physical properties of amorphous polymers (1988)
    Springer
    Colloid & polymer science 266 (1988), S. 501-508 
    Details
    ISSN: 1435-1536
    Keywords: Amorphous polymers ; mechanical properties ; birefringence ; thermal condcutivity ; thermal expansivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Uptil now it has not been possible to explain the different physical properties of amorphous polymers using a model based on a single conceptual scheme. In this paper, a phenomenological model is proposed which tries to explain the mechanical, optical and thermal properties (both thermal conductivity and expansivity) of amorphous polymers. The model has similarities with the composite model, proposed by the present authors, which has proved to be successful in interpreting the different physical properties of semicrystalline polymers. The present model considers the bulk form of the polymer as an aggregate of microscopic units possessing intrinsic physical properties. On drawing, the development of anisotropy in different physical properties is supposed to be due to the development of preferred orientation of these units. The development of the preferred orientation has been estimated directly from birefringence data. The agreement between the calculated and experimental values of the elastic modulus, thermal conductivity and thermal expansivity of PVC, PMMA and PS is found to be reasonable good.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01420760
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  • 4
    Electronic Resource
    Electronic Resource
    Solubility characteristics of poly(N-vinylcarbazole) prepared by Co(II) loaded 13X molecular sieve (1986)
    Springer
    Polymer bulletin 16 (1986), S. 473-477 
    Details
    ISSN: 1436-2449
    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 During the polymerization of N-vinylcarbazole (NVC) by Co(II)-13X the resultant polymer (¯Mn=6000) is soluble in benzene or toluene but partly soluble in methylethyl ketone (MEK). To ascertain whether the MEK insolubility is due to polymer tacticity, the polymer has been further characterized by13C NMR analysis. The atactic structure of polyN-vinylcarbazole (PNVC) initiated by Co(II) has been established from a comparison of methine carbon ( ) peaks with the same for a cationic PNVC(BF3/Et2O, isotactic) and radical PNVC (AIBN, atactic).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00955581
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  • 5
    Electronic Resource
    Electronic Resource
    Cation exchange resins from chemically modified poly(vinyl chloride) (1987)
    Springer
    Polymer bulletin 17 (1987), S. 361-368 
    Details
    ISSN: 1436-2449
    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: Summary Poly(vinyl chloride) has been modified chemically to a cation exchange resin by halogen displacement reactions with phenol sulfonic acid, bisphenol-A sulfonic acid and phenolpthalein sulfonic acid. Ion-exchange capacity, salt-splitting capacity and pH-titration characteristics of these resins have been evaluated. pH-titration behaviour of these resins is consistent with that of a polyfunctional cation-exchanger having pK1=2 and pK2=9–10 corresponding to -SO3H and phenolic-OH groups respectively. The ion-exchange capacity values are comparable in magnitude to those of polystyrene based commercial cation-exchangers such as Amberlite IR-120 and Dowex-50.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00955721
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  • 6
    Electronic Resource
    Electronic Resource
    Erratum (1987)
    Springer
    Polymer bulletin 18 (1987), S. 472-472 
    Details
    ISSN: 1436-2449
    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
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00275604
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  • 7
    Electronic Resource
    Electronic Resource
    Heat transfer in a corner flow (1987)
    Springer
    Heat and mass transfer 21 (1987), S. 13-14 
    Details
    ISSN: 1432-1181
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung Der Aufsatz beschreibt eine Methode zur Berechnung des Wärmeübergangs bei Strömung eines inkompressiblen Fluids in eine Ecke mit Absaugung.
    Notes: Abstract The paper describes a method of evaluating heat transfer in corner flow of an incompressible fluid with suction
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01008212
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  • 8
    Electronic Resource
    Electronic Resource
    Convective heat transfer in a superimposed streaming and swirling flow through a cylindrical duct (1985)
    Springer
    Heat and mass transfer 19 (1985), S. 31-39 
    Details
    ISSN: 1432-1181
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Description / Table of Contents: Zusammenfassung Es werden theoretische Untersuchungen des lokalen konvektiven Wärmeüberganges im Eintrittsbereich eines zylindrischen Rohres mit kombiniertem axialen und tangentialen Eintritt eines Fluids mit zeitunabhängigem Verhalten nach dem Potenzgesetz vorgestellt. Randbedingungen waren dabei konstanter Wärmestrom und konstante Wandtemperatur. Das theoretische Modell verwendet eine integrale Näherung der hydrodynamischen und thermischen Grenzschichttheorie. Es folgt eine funktionale Beziehung zwischen der lokalen Nusseltzahl (Nu z ) und den relevanten Eingangsparametern wie der verallgemeinerten Reynoldszahl $$\left( {Re_{G_i } } \right)$$ und der verallgemeinerten Prandtlzahl (PrG), die mit der tangentialen Eintrittsgeschwindigkeit gebildet werden sowie dem Verhältnis der axialen und tangentialen Geschwindigkeiten am Rohreintritt (VR), der Kennzahl des Strömungsverhaltens des Fluids (n) und dem Verhältnis von axialer Länge zu Rohrdurchmesser (z/D).
    Notes: Abstract Theoretical studies have been carried out to investigate the convective heat transfer coefficients at different locations in the entrance region of a cylindrical duct with combined axial and tangential entry of time-independent power-law fluids. Investigations have been performed with uniform heat flux and uniform wall temperature boundary conditions. Theoretical model uses integral approach of hydrodynamic and thermal boundary layer theory to establish a functional relationship of local Nusselt number (Nu z ) with the pertinent input parameters such as generalised Reynolds number based on tangential velocity of injection $$\left( {Re_{G_i } } \right)$$ , generalised Prandtl number based on inlet tangential velocity (Pr G ), the ratio of axial-to-tangential velocity at the inlet to the duct (V R), the flow behaviour index of the fluid (n) and the ratio of axial-distance-to-duct-diameter (z/D).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01682544
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  • 9
    Electronic Resource
    Electronic Resource
    BDES: A bridge design expert system (1987)
    Springer
    Engineering with computers 2 (1987), S. 125-136 
    Details
    ISSN: 1435-5663
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract The expert system described here designs superstructures for small to medium span highway bridges. The system addresses a domain within the engineering design consultation paradigm. It is installed in a personal microcomputer environment. This paper examines the nature of the bridge design domain as practiced in the United States and its suitability for expert system application. The architecture, the context structure, the knowledge base, the control module, and the implementation of the expert system are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01201260
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  • 10
    Electronic Resource
    Electronic Resource
    Benzene and anthraquinone sulfone derivatives of poly(N-vinylcarbazole) (1988)
    Springer
    Polymer bulletin 20 (1988), S. 323-328 
    Details
    ISSN: 1436-2449
    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: Summary Benzene and anthraquinonesulfonyl chlorides were reacted with poly-N-vinylcarbazole in presence of Friedel-Crafts catalyst to form the corresponding sulfonyl derivatives. The sulfonated poly-N-vinylcarbazoles were characterized by elemental analyses, IR spectroscopy, thermogravimetric analysis and evaluation of permittivity and loss-tangent behaviour with varying applied frequencies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00255731
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