Influence of Filler from a Renewable Resource and Silane Coupling Agent on the Properties of Epoxidized Natural Rubber VulcanizatesReportar como inadecuado




Influence of Filler from a Renewable Resource and Silane Coupling Agent on the Properties of Epoxidized Natural Rubber Vulcanizates - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Journal of Chemistry - Volume 2015 2015, Article ID 796459, 15 pages -

Research Article

Department of Rubber Technology and Polymer Science, Faculty of Science and Technology, Prince of Songkla University, Pattani Campus, Pattani 94000, Thailand

Faculty of Science and Industrial Technology, Prince of Songkla University, Surat Thani Campus, Surat Thani 84000, Thailand

Faculty of Engineering and Computer Science, Osnabrück University of Applied Sciences, Albrechtstrasse 30, 49076 Osnabrück, Germany

Received 25 November 2014; Revised 8 February 2015; Accepted 10 February 2015

Academic Editor: Cengiz Soykan

Copyright © 2015 Wiphawadee Pongdong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Rice husk ash RHA was used as a reinforcing filler in epoxidized natural rubber ENR with various loading levels 0, 10, 20, and 30 phr, and silica filled ENR was also studied for comparison. The effects of RHA content on cure characteristics, mechanical properties, dynamic mechanical properties, and thermoelastic behavior of the filled ENR composites were investigated. It was found that the incorporation of RHA significantly affected the cure characteristics and mechanical properties. That is, the incorporation of RHA caused faster curing reactions and increased Young’s modulus and tensile strength relative to the unfilled compound. This might be attributed to the metal oxide impurities in RHA that enhance the crosslinking reactions, thus increasing the crosslink density. Further improvements in the curing behavior and the mechanical properties of the filled composites were achieved by in situ silanization with bistriethoxysilylpropyl tetrasulfide Si69. It was found that the rubber-filler interactions reinforced the composites. This was indicated by the decreased damping characteristic and the other changes in the mechanical properties. Furthermore, the ENR composites with Si69 had improved filler dispersion. Temperature scanning stress relaxation TSSR results suggest that the metal oxide impurities in RHA promote degradation of the polymer network at elevated temperatures.





Autor: Wiphawadee Pongdong, Charoen Nakason, Claudia Kummerlöwe, and Norbert Vennemann

Fuente: https://www.hindawi.com/



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