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  • 1
    Electronic Resource
    Electronic Resource
    Polymerization Reactions occurring during Dinitrophenylation of α-, β- and ω-Amino-acids with Sanger's Reagent (1954)
    [s.l.] : Nature Publishing Group
    Nature 174 (1954), S. 1187-1188 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Dinitrophenylations were carried out by Sanger's method1, using l-fluoro-2,4-dinitrobenzene in aqueous ethanol in the presence of sodium bicarbonate. Isolated products as well as samples of reaction mixtures were analysed by chromatography on paper strips using a descending technique (see Table 1). ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/1741187b0
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  • 2
    Electronic Resource
    Electronic Resource
    Complex Formations between Iso and Syndiotactic Polymethylmethacrylate in Solutions (1968)
    [s.l.] : Nature Publishing Group
    Nature 217 (1968), S. 949-949 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] From the viscosity measurements, made with a Ubbelohde viscosimeter, the reduced specific viscosity was calculated as ijgf = (te -.)/.. c(dl./g) A Sofica 40,000 A was used to measure the light-scattering value Vv in mA, which is the intensity of the vertical polarized scattered light transmitted ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/217949a0
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  • 3
    Electronic Resource
    Electronic Resource
    A novel synthesis of vinyl esters from vinylversatate-10
    Amsterdam : Elsevier
    Tetrahedron 30 (1974), S. 4205-4207 
    Details
    ISSN: 0040-4020
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0040-4020(01)97407-1
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  • 4
    Electronic Resource
    Electronic Resource
    Occurrence of Small-angle X-Ray Diffraction Maxima in some Artificial Cellulose Fibres (1952)
    [s.l.] : Nature Publishing Group
    Nature 170 (1952), S. 369-370 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] In fibres from highly oriented polyamides and from some other synthetic polymers, such as 'Teryleiie' and polythene, maxima at small angles have been observed on the meridian of the fibre diagram and have been related tentatively to a periodicity in the length and arrangement of the crystalline and ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/170369b0
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  • 5
    Electronic Resource
    Electronic Resource
    The constant stress behaviour of polystyrene-low density polyethylene blends (1982)
    Springer
    Journal of materials science 17 (1982), S. 2343-2350 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The constant-stress behaviour of low-density polyethylene toughened polystyrene has been analysed. It was found that the initial strain-time behaviour during constant-stress tensile tests is well described by a simple model that predicts a proportionality between strain and the square of time, provided a correction for craze formation during the application of stress is made. By analysing strain-time curves at different stresses it has been determined that the product of the rates of craze initiation and of craze growth is exponentially dependent on stress. The attainment of a constant strain rate during constant-stress experiments and the attainment of a constant-stress level during constant strain-rate experiments result from a strong decrease in the rate of craze initiation. This effect allowed the determination of the stress and temperature dependences of the rate of craze growth. This rate was found to be well described by the Eyring equation, which is in agreement with earlier results obtained from constant stress- and strain-rate experiments.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00543743
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  • 6
    Electronic Resource
    Electronic Resource
    Microscopicin situ observation of craze formation in polystyrene-glass bead composites (1984)
    Springer
    Journal of materials science 3 (1984), S. 307-309 
    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/BF00729380
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  • 7
    Electronic Resource
    Electronic Resource
    The mechanical properties of chalk-filled polypropylene: a preliminary investigation (1990)
    Springer
    Journal of materials science 25 (1990), S. 3089-3095 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The results are discussed of mechanical tests on chalk-filled polypropylene. This investigation had a preliminary character and was aimed at locating points of interest for further research. The effects of a variation of the particle size of the filler, the filler content and the interfacial adhesion on the properties were examined. The observed differences were explained qualitatively on the basis of a study of the microdeformations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00587655
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  • 8
    Electronic Resource
    Electronic Resource
    Shear band formation in polycarbonate-glass bead composites (1984)
    Springer
    Journal of materials science 19 (1984), S. 3271-3275 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The shear band formation at glass beads embedded in a polycarbonate matrix subjected to a uniaxial tension has been investigated by microscopic in situ observation. The degree of interfacial adhesion was varied by different glass surface treatments. To gain insight into the three-dimensional stress field requirement for shear band formation, the distributions of several elastic failure criteria around an isolated adhering glass sphere in a polycarbonate matrix have been computed with the aid of finite element analysis. It was found that the mechanism for shear band formation is fundamentally different for adhering and non-adhering glass beads. In the case of excellent interfacial adhesion, the shear bands form near the surface of the bead in regions of maximum principal shear stress and of maximum distortion strain energy. In the case of poor interfacial adhesion, shear band formation is preceded by dewetting along the interface between bead and matrix.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00549814
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  • 9
    Electronic Resource
    Electronic Resource
    A model for the stress-strain behaviour of toughened polystyrene (1982)
    Springer
    Journal of materials science 17 (1982), S. 741-746 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A model has been developed to determine the rates of craze initiation and craze growth in opaque materials that deform by crazing, such as toughened polystyrene, and to predict their stress-strain behaviour. It is shown that crazed polystyrene toughened with low density polyethylene can be regarded as a series of linearly elastic crazes and toughened polystyrene. This implies that the amount of craze material, stress and strain are related in a simple fashion. As the amount of craze material can be calculated from the rates of craze initiation and craze growth, stress-time behaviour can be calculated if strain-time behaviour is known, and vice versa.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00540370
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  • 10
    Electronic Resource
    Electronic Resource
    A model for the stress-strain behaviour of toughened polystyrene (1982)
    Springer
    Journal of materials science 17 (1982), S. 747-752 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The general stress-strain relationship derived in an earlier paper is applied to analyse experimental stress-strain curves of polystyrene-polyethylene blends. It is concluded from the stress and temperature dependence of the rates of craze initiation and craze growth that these rates can be described by means of the Eyring relationship. By inserting this result in the general stress-strain relationship, experimental stress-strain curves could be compared with stress-strain curves as predicted by the model. For constant strain rate experiments and constant stress rate experiments a good agreement was obtained, proving the applicability of the model.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00540371
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