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  • 1
    Electronic Resource
    Electronic Resource
    W16.1: A new fixed wavelength diffraction station at the SRS Daresbury : Proceedings of the 5th international conference on synchrotron radiation instrumentation (1995)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 1311-1313 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Station W16.1 is a fixed wavelength (1.4 A(ring)) x-ray diffraction station recently constructed and commissioned at the SRS. It has been designed specifically for time-resolved studies of noncrystalline and fibrous materials and optimized for low angle measurements. Wide angle diffraction will also be available with simultaneous small and wide angle scattering/diffraction a future facility. In order to perform dynamic (∼1 ms) low angle measurements on weakly scattering systems, the station design has had to incorporate several novel features so as to achieve the predicted 1×1013 photon/s at the specimen. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1146514
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  • 2
    Electronic Resource
    Electronic Resource
    Five new experimental stations at the SRS Daresbury from a 6 T superconducting wiggler magnet : Proceedings of the 5th international conference on synchrotron radiation instrumentation (1995)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 66 (1995), S. 1633-1635 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: Daresbury Laboratory is currently completing the construction and commissioning of five new experimental research stations utilizing high flux hard x-ray radiation from a 6 T superconducting wiggler magnet. The broad areas of science covered by the new stations and the novel features are presented. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1145867
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  • 3
    Electronic Resource
    Electronic Resource
    Time-resolved x-ray diffraction station: X-ray optics, detectors, and data acquisition : International conference on synchrotron radiation instrumentation (1989)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 60 (1989), S. 2346-2349 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A new x-ray beamline has recently been built, and is now operational, on dipole magnet 2 of the Synchrotron Radiation Source (SRS) at Daresbury. This beamline takes 32 mrad of horizontal aperture from a central tangent point. The time-resolved x-ray diffraction (TRXD) Station 2.1, takes 17 mrad of horizontal aperture and is the central point of this paper. Beamline 2 has been realized as part of a SERC–MRC agreement.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1140765
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  • 4
    Electronic Resource
    Electronic Resource
    Scientific Careers of 1851 Exhibition Scholars (1968)
    [s.l.] : Nature Publishing Group
    Nature 218 (1968), S. 1011-1016 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The patterns of education, career and migration of the Exhibition of 1851 Scholars provide a valuable case study for the endowment of ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2181011a0
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  • 5
    Electronic Resource
    Electronic Resource
    Simultaneous Rheology and Small-Angle Scattering Experiments on Block Copolymer Gels and Melts in Cubic Phases (1998)
    Copenhagen : International Union of Crystallography (IUCr)
    Applied crystallography online 31 (1998), S. 881-889 
    Details
    ISSN: 1600-5767
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: A new instrument for simultaneous small-angle X-ray scattering and rheology experiments on soft solids is described. This device is based on a commercial rheometer with a shear sandwich geometry in which the sample is subjected to a planar oscillatory deformation. This instrument has been used for time-resolved small-angle X-ray scattering/rheology experiments at the Synchrotron Radiation Source, Daresbury Laboratory, England. The focus has been in particular on the effect of large-amplitude shearing on the orientation of cubic phases in gels of block copolymers formed in concentrated solutions, and on the bicontinuous cubic phase of a block copolymer melt. Representative results are presented for face-centred cubic (f.c.c.) and body-centred cubic (b.c.c.) phases in gels of poly(oxyethylene)–poly(oxybutylene) diblock copolymers, and for the bicontinuous cubic `gyroid' structure in a poly-(ethylene-alt-propylene)–poly(dimethylsiloxane) di-block copolymer melt. The orientations of the micellar b.c.c. phases in the gels and the gyroid structure (belonging to the b.c.c. space group Ia\bar 3d) following large-amplitude shearing are shown to be the same, i.e. directionally oriented crystals are produced in both cases, in which (111) directions are oriented along the shear direction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0021889898007699
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  • 6
    Electronic Resource
    Electronic Resource
    Time-Resolved Simultaneous SAXS/WAXS of the Drawing of Polyethylene at the Daresbury SRS (1996)
    Chester : International Union of Crystallography (IUCr)
    Journal of synchrotron radiation 3 (1996), S. 84-90 
    Details
    ISSN: 1600-5775
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Geosciences , Physics
    Notes: A system has been developed which represents a significant advance in the quality and extent of small- and wide-angle X-ray scattering data (SAXS and WAXS) that can be recorded simultaneously with strain data during the drawing and annealing of polymer materials. WAXS data are recorded using a Photonic Science charge-coupled-device area detector and SAXS data using a gas-filled multiwire area detector. Strain data, for the region of the specimen from which the SAXS/WAXS data are collected, are calculated from an accurately synchronized continuously recorded video image of the specimen. The system allows X-ray and video image data to be collected as a series of frames with essentially no `dead-time' between frames. The data are fully two-dimensional and can be collected for a wide range of d spacings. The use of this system to investigate the stress-induced orientation and phase changes during the drawing of a range of grades of commercially available polyethylene is described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0909049596000192
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  • 7
    Electronic Resource
    Electronic Resource
    Adhesion to skin (1985)
    Springer
    Journal of materials science 20 (1985), S. 3621-3630 
    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 modified adhesive peel test is described in which a spring is inserted between the test machine cross-head and the peeling strip. In tests using two pressure sensitive surgical adhesives (uncrosslinked elastomers) this “soft machine” gives results which differ significantly from those obtained with a conventional “hard machine”. In particular, when peeling energy is plotted against peeling velocity, the soft machine reveals a regime of low energy peeling and a transition to the normal high energy peeling. The transition behaviour has been studied as a function of adhesive thickness, cross-head speed and spring stiffness. The phenomena revealed by soft machine testing are interpreted in terms of variations in crack-tip radius caused by flow of the uncrosslinked rubber. The practical implication is that far more information can be obtained from soft machine tests than from conventional hard machine tests. The problem of oscillating peel force is also eliminated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01113769
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  • 8
    Electronic Resource
    Electronic Resource
    In vitro degradation of poly(ester-urethanes) for biomedical applications (1996)
    Springer
    Journal of materials science 7 (1996), S. 17-20 
    Details
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Degradation studies on a series of polyesterurethanes having different compositions of hard and soft blocks have been performed utilizing an accelerated test method. Degradation was followed by titrimetry, mass loss, mechanical properties and infrared spectroscopy. As the number of methylene groups present within the polyester moiety was increased, the resistance to degradation also increased. The presence of an aromatic component in the hard block reduced the rate of hydrolysis but the degradation in mechanical properties was accelerated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00121184
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  • 9
    Electronic Resource
    Electronic Resource
    Radiation-induced crystallinity changes in polyethylene blends (1985)
    Springer
    Journal of materials science 20 (1985), S. 2839-2845 
    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 It was previously found that upon exposure to high energy radiation, linear polyethylenes experience an increase in the degree of crystallinity [1]. The increase continued monotonically with ageing time [2]. To gain a better understanding of these unexpected results the present paper examines the effects in physical blends of ultra-high molecular weight polyethelyne (UHMW PE) and conventional high density polyethylene (HDPE). No synergistic effects were observed in the blends, but the analysis of the thermal and tensile yield stress data provides some insight into the phenomenon. It provides support for the explanation involving radiation-induced chain-scission followed by recrystallization, and suggests that the chain-scission does not continue with time after initial irradiation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00553046
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  • 10
    Electronic Resource
    Electronic Resource
    Adhesion to skin (1987)
    Springer
    Journal of materials science 22 (1987), S. 2833-2841 
    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 failure energy of an adhesive bond can be factorized into two terms, one of which is a dimensionless loss function and the other, the true interfacial bonding energy,θ 0. Experimental techniques have been developed to effect a separation of these two terms and thus measureθ 0, but they are unsuitable for the pressure-sensitive adhesives used in surgical tapes and dressings. This is because these adhesives flow readily under load. This paper describes an extrapolation technique by which this problem can be resolved. Adhesive peel data are extrapolated both to zero peel velocity and zero load, to give a true threshold value for peeling energy which is independent of temperature. Values ofθ 0 are given for a natural-rubber based adhesive and substrates of glass and human skinin vivo. For glassθ 0 = 28J m−2 and for normal skinθ 0 ≃ 14J m-2.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01086479
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