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Effects of Orientation on the Segmental Dynamics of Natural Rubber

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Abstract:

The 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.

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Periodical:

Materials Science Forum (Volume 714)

Pages:

57-61

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.714.57

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Online since:

March 2012

Authors:

Marianella Hernandez Santana, Tiberio A. Ezquerra, Miguel A. López-Manchado

Keywords:

Dielectric Spectroscopy, Natural Rubber (NR), Segmental Dynamics, Strain-Induced Crystallization

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© 2012 Trans Tech Publications Ltd. All Rights Reserved

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