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  • Polymer and Materials Science  (2)
  • 1985-1989  (2)
Document type
Keywords
Publisher
Years
Year
  • 1
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The size of the crystalline regions of regenerated cellulosic fibers was determined by means of transmission electron microscopy, small angle X-ray scattering, and wide angle X-ray diffraction. All three methods lead in satisfying conformity to the following dimensions: length: 120-140 Å, width: 80-100 Å, thickness: 30-40 Å. The broad plane of the platelet shaped crystallites is situated parallel to the 101-lattice plane, the small edge plane has an orientation parallel to the 101-lattice plane. The -crystallites form strands, which have a length of 1500-5500 Å. They are partly bundled up to clusters with a diameter of 300-600 Å, partly separated by less dense spacings. The distance between the crystalline regions amounts to 20-40 Å in longitudinal and cross direction.
    Notes: Die Dimensionen der kristallinen Bereiche von Regeneratcellulosefasern wurden mittels Transmissionselektronenmikroskopie, Röntgenkleinwinkelstreuung und Röntgenweitwinkeldiffraktion bestimmt. In befriedigender Übereinstimmung wurden nach allen drei Methoden folgende Abmessungen gefunden: Länge: 120-140 Å, Breite: 80-100 Å, Dicke: 30-40 Å. Die breite Ebene der blättchenförmigen Kristallite verläuft parallel zur 101-Netzebene, die schmale Kantenebene parallel zur 101-Netzebene. Die Kristallite bilden Ketten mit einer Länge von 1500 bis 5500 Å, die teilweise zu Clustern mit einem Durchmesser von 300 bis 600 Å gebündelt sind, teilweise durch Zonen geringerer Dichte voneinander getrennt sind. Die Abstände zwischen den kristallinen Bereichen betragen in Längs- und Querrichtung 20 bis 40 Å.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Chemie Ingenieur Technik - CIT 60 (1988), S. 519-525 
    ISSN: 0009-286X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Logistics in the manufacture of chemical products. This survery covers the fields of location analysis, organization of operational material flow, and materials management, all of which are interlocked with each other. Logistics problems with location analysis lie in the area of infrastructure, procurement, and distribution. The organization of the operational material flow has to be based on a closed concept, taking simultanously into consideration interests of production techniques and of logistics. Special attention has to be paid to the reciprocal effect of plant and storage capacity. With complex production structures simulation models should be used, including a statistical model of the market demands, systematic variation of material flows, and grouping of technical equipment. Target is a minimization of total cost. For market oriented operation of complex productions, integrated materials management systems have to be employed. The systems supply a transparent material flow starting from the market demands via the control of production up to the procurement of raw materials.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    Location Call Number Limitation Availability
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