Influence concentration of modifying agent on properties of natural rubber/organoclay nanocomposites |
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| Affiliation: | 1. Department of Engineering Physics, Adichunchanagiri Institute of Technology, Chickamagalur, Karnataka 577102, India;2. PURSE Lab, Mangalagangotri, Mangalore University, Karnataka 574199, India;3. Department of Physics, Government First Grade College, Bannur, Mysuru, Karnataka 571101, India;4. Department of Physics, School of Engineering and Technology, Jain University, Jain global campus, Bangalore, India;5. Department of Physics, St. Mary''s P.U. College, Chickamagaluru, Karnataka 577101, India;6. Department of Materials Science, Mangalagangotri, Mangalore University, Karnataka 574199, India |
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| Abstract: | Sodium-montmorillonite (Na-MMT) nanoclay was modified with different concentrations of octadecylamine organic modifying agent at 0.5, 1.0 and 1.5 times the CEC of Na-MMT. Influence of concentration of modifying agent on properties of the organoclays and natural rubber/organoclay nanocomposites was investigated. It was found that the optimum concentration of modifying agent was 1.5 times the CEC of Na-MMT. That is, at this concentration, larger d-spacing of organoclay particles and higher degree of clay dispersion in natural rubber matrix were observed. Larger interlayer d-spacing also caused enhancement of the mechanical properties of the NR/organoclay nanocomposites. Additionally, the NR/organoclay nanocomposites with higher concentration of modifying agent exhibited faster curing reaction with higher crosslink density. Furthermore, the organoclays with larger d-spacing and higher degree of dispersion in the natural rubber matrix exhibited enhancement of the mechanical and dynamic properties and thermal stability of natural rubber/organoclay nanocomposites. |
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| Keywords: | Natural rubber/clay nanocomposites Organoclay Modifying agent Thermal-mechanical behavior |
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