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  • crosslinking kinetics  (2)
  • Permafrost
  • Quantum optics, physics of lasers, nonlinear optics, classical optics
  • 1995-1999  (2)
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Thermosets obtained by chemical modification of epichlorohydrin-ethylene oxide copolymer and their crosslinking through double bonds (1995)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 33 (1995), S. 941-948 
    Details
    ISSN: 0887-624X
    Keywords: polyethers ; differential scanning calorimetry ; crosslinking kinetics ; PECH-PEO ; thermosets ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The epichlorohydrin-ethyleneoxide copolymer is modified with 10-undecenoate and 4-pentenoate moieties in order to obtain thermosets by cross-linking through their double bonds. These polymers are then characterized using NMR, IR, chlorine elemental analyses, X-ray powder diffraction, DSC, TGA, and viscosimetric measurements. Because the thermal crosslinking reaction overlaps in all cases with degradation processes, a free radical source (dicumyl peroxide) is necessary. The Arrhenius kinetic parameters are determined by DSC, using Ozawa and Kissinger expressions. Finally, the quality of cured materials is tested by TGA. © 1995 John Wiley & Sons, Inc.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1995.080330607
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  • 2
    Electronic Resource
    Electronic Resource
    Crosslinking study of polyethers containing pendent double bonds (1995)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 33 (1995), S. 1565-1571 
    Details
    ISSN: 0887-624X
    Keywords: olephins ; crosslinking kinetics ; polyethers ; differential scanning calorimetry ; thermogravimetric analyses ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: This article studies the crosslinking reactions of some polyethers containing double bonds on the side chains. Thermal crosslinking takes place in all cases, but is overlapped by the degradation process. So, a catalyst has to be used to obtain the cured material and avoid degradation. The best initiator appears to be dicumyl peroxide and the maximum cross-linking degree is achieved only with 5% (w/w). Thermogravimetric analyses are used to test the quality of the cured materials. IR spectroscopy shows that crosslinking actually takes place by polymerizing pendent double bonds. Furthermore, activation energies for thermal and radical initiated crosslinking are determined by means of dynamic DSC studies. © 1995 John Wiley & Sons, Inc.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1995.080331002
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    Paper (German National Licenses)
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