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Effect of naturally occurring crosslinking junctions on green strength of natural rubber
Author(s) -
Thuong Nghiem Thi,
Yamamoto Oraphin,
Nghia Phan Trung,
Cornish Katrina,
Kawahara Seiichi
Publication year - 2017
Publication title -
polymers for advanced technologies
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.61
H-Index - 90
eISSN - 1099-1581
pISSN - 1042-7147
DOI - 10.1002/pat.3887
Subject(s) - natural rubber , materials science , hevea brasiliensis , ultimate tensile strength , fourier transform infrared spectroscopy , composite material , swelling , chemical engineering , engineering
The effect of the naturally occurring crosslinking junctions on green strength of natural rubber, isolated from Hevea brasiliensis , was investigated by using rubber extracted from Parthenium argentatum Gray (Guayule) as a model. Guayule rubber and natural rubber were characterized through nuclear magnetic resonance spectroscopy and size exclusion chromatography. The non‐rubber components of Guayule rubber and natural rubber were characterized by Kjeldahl method and Fourier transform infrared spectroscopy. It was found that Guayule rubber contains a much higher amount of fatty acids and their esters while it contains no proteins. The gel content, determined by swelling method, was related to a number of naturally occurring crosslinking junctions of Guayule rubber and natural rubber. The outstanding green strength of natural rubber was attributed to the effect of naturally occurring crosslinking junctions, when stress–strain curve and tensile properties of unvulcanized Guayule rubber were compared with those of unvulcanized natural rubber. Copyright © 2016 John Wiley & Sons, Ltd.