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  • FABRICATION TECHNOLOGY  (2)
  • Polymer and Materials Science  (1)
  • 1985-1989  (3)
  • 1
    Electronic Resource
    Electronic Resource
    A study of the nature and formation of zinc polyacrylate cement using Fourier transform infrared spectroscopy (1988)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 22 (1988), S. 623-631 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: The formation and structure of zinc polyacrylate has been studied by Fourier transform infrared spectroscopy (FTIR). Using this technique we have shown that the fully hardened cement is bonded predominantly by zinc carboxylate complexes, rather than by associations of purely ionic character as had previously been supposed. Ionic bonds are formed in the initial stages of the reaction but are gradually converted to complex forms. This bond rearrangement appears partly responsible for physical changes that occur during gelation, setting, and hardening.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820220704
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    Paper (German National Licenses)
    Fulltext
  • 2
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    Unknown
    Snapring Quick Fastener (1985)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Snapring fastener allows quick attachment and detachment of solar panels. Springy structure bent to fit any recess, making solar-panel removal or repair extremely simple.
    Keywords: FABRICATION TECHNOLOGY
    Type: NPO-15724 , NASA Tech Briefs (ISSN 0145-319X); 8; 4; P. 569
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Supporting Structures for Flat Solar-Cell Arrays (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Strong supporting structures for flat solar photovoltaic arrays built with such commonly available materials as wood and galvanized steel sheet. Structures resist expected static loads from snow and ice as well as dynamic loads from winds and even Earthquake vibrations. Supporting structure uses inexpensive materials. Parts prefabricated to minimize assembly work in field.
    Keywords: FABRICATION TECHNOLOGY
    Type: NPO-15600 , NASA Tech Briefs (ISSN 0145-319X); 9; 3; P. 163
    Format: text
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    NASA TECHNICAL REPORTS
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