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Effects of Orientation on the Segmental Dynamics of Natural Rubber

AuthorsHernandez, Marianella; Ezquerra, Tiberio A. ; López-Manchado, Miguel A.
Issue Date2012
PublisherTrans Tech Publications
CitationMaterials Science Forum 714: 57- 61 (2012)
AbstractThe effects of orientation on the segmental dynamics of vulcanized natural rubber have been studied by dielectric relaxation spectroscopy. Morphological changes during the stretching process were also investigated by wide-angle X-ray scattering using a synchrotron radiation. Results reveal that segmental dynamics of NR is affected by uniaxial stretching since a slowing down of the segmental relaxation is achieved. Also, there is evidence of an amorphous/semi-crystalline transition around 300% strain; below this extension, molecular chains show orientation, but no crystallization takes place; while above such strain, the crystalline structure formed limits the segmental dynamics of NR.
Identifiersdoi: 10.4028/www.scientific.net/MSF.714.57
issn: 0255-5476
Appears in Collections:(CFMAC-IEM) Artículos
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