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  • Polymer and Materials Science  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Effect of structure on the thermal behaviour of ethynyl-terminated imide resins (1996)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 236 (1996), S. 55-66 
    Details
    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: Eine Reihe aromatischer Imide mit Phosphinoxid-Einheiten im Molekülgerüst und Ethinyl-Endgruppen wurde durch Reaktion vom 3-Ethinylanilin mit Tris(3-aminophenyl)-phosphinoxide oder Bis(3-aminophenyl)-methylphosphinoxide und Pyromellitsäuredianhydrid oder 3, 3′,4, 4′-Benzophenontetracarbonsäuredianhydrid oder 4, 4′-Hexafluorisopropylidenbis(phthalsäureanhydrid) hergestellt. Die Struktur der Substanzen wurde mittels IR- und NMR-Spektroskopie sowie Elementaranalyse charakterisiert. Das thermische Verhalten wurde mittels Differentialkalorimetrie und Thermogravimetrie untersucht. Die Ethinyl-Endgruppen ermöglichen eine Härtung bei hohen Temperaturen. Die Zersetzungstemperaturen unter Stickstoff der gehärteten Harze liegen bei über 500°C. Bei 800°C beträgt der Aschegehalt zwischen 52% und 63,5%.
    Notes: A series of ethynyl-terminated aromatic imide monomers containing phosphine oxide in the backbone were synthesized by the reaction of tris(3-aminophenyl) phosphine oxide (TAP) or bis(3-aminophenyl)methyl phosphine oxide (BAP) with pyromellitic dianhydride (PMDA) or 3, 3′,4, 4′-benzophenone tetracarboxylic acid dianhydride (BTDA) or 4, 4′-perfluoroisopropylidenebis(phthalic anhydride), and 3-ethynyl aniline. Structural characterization was done by infrared, nuclear magnetic resonance spectroscopy and elemental analysis. Thermal characterization was done by differential scanning calorimetry and thermogravimetric analysis. The decomposition temperatures of cured resins were above 500°C in nitrogen atmosphere. Char yield at 800°C ranged from 52-63.5%.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1996.052360105
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Methyl nadimide resins: Synthesis and characterizationPaper presented at IXth National Symposium and Workshop on Thermal Analysis held at Goa on November 8-10, 1993. (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 53 (1994), S. 1073-1081 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: This article describes the synthesis and characterization of several methyl nadimides endcapped resins based on tris(3-aminophenyl)phosphine oxide. These resins were prepared by reacting methyl-5-norbornene 2,3-dicarboxylic anhydride (methyl nadic anhydride) (MNA), pyromellitic dianhydride (PMDA)/3,3′,4,4′-benzophenone tetracarboxylic acid dianhydride (BTDA)/2,2-bis(3,4-dicarboxyphenyl) hexafluoropropane dianhydride (6F), and tris(3-aminophenyl)phosphine oxide (TAP) in glacial acetic acid/acetone. Structural characterization of the resins was done by elemental analysis, IR, and 1H-NMR. Thermal characterization of uncured resins using DSC and TGA techniques revealed an exothermic transition accompanied by a weight loss in the temperature range of 200-350°C. Residual weight at 800°C in nitrogen was found to be 47-55%. Isothermal curing of the resins was done at 340°C for 1 h in an air atmosphere. The cured resins were stable up to 400 ± 20°C. © 1994 John Wiley & Sons, Inc.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1994.070530809
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    Paper (German National Licenses)
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