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  • 1
    Electronic Resource
    Electronic Resource
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 171 (1973), S. 211-227 
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Der Bruch von linearen Makromolekülen als Folge der Dehnungsdeformation von orientiertem Nylon 6 wurde mit Elektronenspinresonanz (ESR) an zwei Proben, einer Einzelfaser (Borste) und technischem, weing verdrilltem Garn, untersucht. Die Ergebnisse an der Einzelfaser zeigen, daß die Dehnungsdeformation in einer wesentlichen, irreversiblen Weise die Konzentration der freien Radikale, doch nicht die Bruchspannung und Deformation beeinflußt. Das mechanische Verhalten des Garns in Bruchnähe ist völlig verschieden von dem der Einzelfaser. Die vorliegenden Versuche lassen ernste Zweifel aufkommen an der Korrektheit frühererBerichte, in denen angenommen wurde, daß die mittels ESR beobachteten Kettenbrüche eindeutig den Deformations- und Bruchprozeß bestimmen.
    Notes: Bond rupture associated with the tensile deformation of oriented Nylon 6 has been studied by electron spin resonance (ESR). Two samples were investigated, a single monofilament (“bristle”) and a commercial low twist yarn. Experiments with the monofilament show that tensile deformation has substantial irreversible effects on the free radical concentration observed at failure, but no effect on the ultimate properties of the fiber. It was also demonstrated that the stress-strain behavior of the yarn is quite different from that of the fibers near the ultimate extension. These present experiments raise serious questions as to the correctness of previous reports in which the bond breakage observed by ESR is assumed to uniquely determine the deformation and fracture process.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
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