Investigation of Un-Vulcanized Natural Rubber by Means of Temperature Scanning Stress Relaxation Measurements

Miao Wu; Michael Heinz; Norbert Vennemann

doi:10.4028/www.scientific.net/AMR.718-720.117

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 718-720Investigation of Un-Vulcanized Natural Rubber by...

Investigation of Un-Vulcanized Natural Rubber by Means of Temperature Scanning Stress Relaxation Measurements

Abstract:

Two different types of un-vulcanized natural rubber, air dried sheets (ADS) and SVR-3L block rubber, were investigated by a new testing method and the results are compared with other mechanical properties. It was found that green strength is strongly reduced if the sample is thermally treated before testing. Presumably, the decrease of strength is caused by a decrease of branch points, mainly composed of phospholipids, which are linked to the a - terminal groups of the rubber molecules. The existence of two different types of branch points is indicated by relaxation spectra, obtained from temperature scanning stress relaxation (TSSR) measurements.

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Periodical:

Advanced Materials Research (Volumes 718-720)

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117-123

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https://doi.org/10.4028/www.scientific.net/AMR.718-720.117

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July 2013

Authors:

Miao Wu, Michael Heinz, Norbert Vennemann

Keywords:

Green Strength, Natural Rubber (NR), Relaxation Spectra, Stress Relaxation, TSSR

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