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  • GROUND SUPPORT SYSTEMS AND FACILITIES (SPACE)  (1)
  • crosslinking density  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Rheological properties of lightly crosslinked carboxy copolymers in aqueous solutions (1992)
    Springer
    Rheologica acta 31 (1992), S. 351-360 
    Details
    ISSN: 1435-1528
    Keywords: Rheological properties ; crosslinked copolymers ; crosslinking density ; microgel solution ; storage modulus
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract The rheological properties of a series of lightly crosslinked carboxy copolymers in aqueous solutions have been evaluated in steady shear and dynamic oscillatory modes. Viscosity profiles and the behavior of storage modulus are related to the chemical composition of the copolymers and their crosslinking density. A maximum in viscosity and in storage modulus which depends on the type of crosslinking agent used is explained by a combination of a chain entanglement mechanism and a closely-packed spheres model. The recovery of viscosity and storage modulus after shearing is very fast and is related to the very fast rearrangement of the microgel structure as a function of time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00418332
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    Paper (German National Licenses)
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    Streamlining shuttle ground operations (1986)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: To meet NASA Space Transportation System goals the Shuttle Processing Contractors have to reduce Space Transportation System ground processing time and ground processing costs. These objectives must be met without compromising safety of flight or safety during assembly, test, and service operations. Ground processing requirements are analyzed to determine critical serial flow paths and costly labor-intensive tasks. Processing improvements are realized by improvements in processing methodology, by application of computer-aided technology, and by modernization of KSC facilities. Ongoing improvement efforts are outlined and progress-to-date is described.
    Keywords: GROUND SUPPORT SYSTEMS AND FACILITIES (SPACE)
    Format: text
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    NASA TECHNICAL REPORTS
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