Vulcanization characteristics and dynamic mechanical behavior of natural rubber reinforced with silane modified silica
Conference proceedings article
Authors/Editors
Strategic Research Themes
No matching items found.
Publication Details
Author list: Chonkaew W., Minghvanish W., Kungliean U., Rochanawipart N., Brostow W.
Publisher: American Scientific Publishers
Publication year: 2011
Volume number: 11
Issue number: 3
Start page: 2018
End page: 2024
Number of pages: 7
ISSN: 1533-4880
eISSN: 1533-4899
Languages: English-Great Britain (EN-GB)
View in Web of Science | View on publisher site | View citing articles in Web of Science
Abstract
Two silane coupling agents were used for hydrolysis-condensation reaction modification of nanosilica surfaces. The surface characteristics were analyzed using Fourier transform infrared spectroscopy (FTIR). The vulcanization kinetics of natural rubber (NR) + silica composites was studied and compared to behavior of the neat NR using differential scanning calorimetry (DSC) in the dynamic scan mode. Dynamic mechanical analysis (DMA) was performed to evaluate the effects of the surface modification. Activation energy E a values for the reaction are obtained. The presence of silica, modified or otherwise, inhibits the vulcanization reaction of NR. The neat silica containing system has the lowest cure rate index and the highest activation energy for the vulcanization reaction. The coupling agent with longer chains causes more swelling and moves the glass transition temperature T g downwards. Below the glass transition region, silica causes a lowering of the dynamic storage modulus G′, a result of hindering the cure reaction. Above the glass transition, silica - again modified or otherwise - provides the expected reinforcement effect. © 2011 American Scientific Publishers.
Keywords
Dynamic mechanical analysis, nanocomposites, Natural rubber reinforcement, Vulcanization
Contact Information