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Please use this identifier to cite or link to this item: http://repository.li.mahidol.ac.th/dspace/handle/123456789/19391
Title: Mechanical characteristics of hydrogenated natural rubber vulcanizates
Authors: Yuko Ikeda
Pranee Phinyocheep
Sumet Kittipoom
Jareerat Ruancharoen
Yota Kokubo
Yuichi Morita
Kensuke Hijikata
Shinzo Kohjiya
Kyoto Institute of Technology
Mahidol University
The Institute of Science and Technology for Research and Development, Mahidol University
Prince of Songkla University
Keywords: Materials Science
Issue Date: 31-Dec-2008
Citation: Polymers for Advanced Technologies. Vol.19, No.11 (2008), 1608-1615
Abstract: Mechanical properties of partially hydrogenated natural rubber (HNR) vulcanizates were evaluated regarding their chemical structure and crystallizable nature of HNR, and are reported here, to the best of our knowledge, for the first time. HNRs of three levels of hydrogenation (20.6, 29.0, and 40.6 mol%) were successfully prepared by the chemical modification of natural rubber (NR) latex using N2H4 and H2O2 as reagents, in a sufficient amount for preparing sulfur-crosslinked samples to be subjected to mechanical and structural measurements. The three HNR vulcanizates were found to be crystallizable upon stretching; it is noted that even 40.6 mol% hydrogenation did not prevent HNR vulcanizates from crystallization upon stretching, while their onset strain of crystallization was higher than that of NR vulcanizate. The hysteresis loss and residual strain up to a stretching ratio of 2 for the HNR vulcanizates tended to become larger with the increase in the degree of the hydrogenation. Tensile and dynamic mechanical properties of 20.6 mol% hydrogenated HNR vulcanizate were comparable to those of NR vulcanizate. From differential scanning calorimetry and temperature dispersion of dynamic modulus or loss, the glass transition temperatures of HNR vulcanizates were found to be almost the same as that of NR vulcanizate, which is also notable. The thermal stability of HNR vulcanizates was better than that of NR vulcanizate. Thus, this chemical modification seems to give a promising NR derivative whose properties can be equivalent or even better than the mother polymer. Copyright © 2008 John Wiley & Sons, Ltd.
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=58049116716&origin=inward
http://repository.li.mahidol.ac.th/dspace/handle/123456789/19391
ISSN: 10991581
10427147
Appears in Collections:Scopus 2006-2010

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