The effect of modified carbon black and nano-silica, individually and in combination, on the curing, mechanical, and dynamical properties of butyl rubber (IIR)

Farzaneh Jaberi Mofrad, Ali Ahmadpour, Saeed Ostad Movahed
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Abstract

This study evaluates the effectiveness of a developed surface-modified carbon black, both alone and combined with nano-silica, as a hybrid filler for butyl rubber (IIR) compounds. The modification process, followed by coupling agent treatment, influenced crucial curing properties, including torque, cross-link density, viscosity, stiffness, and curing time. Scanning electron microscopy (SEM) analysis revealed improved filler dispersion and enhanced filler-rubber compatibility due to surface modification. The ∆Torque for compounds containing modified carbon black surpassed others by 13%. Mechanical properties such as tensile strength, elongation at break, modulus, tearing strength, and hardness were significantly influenced by filler type and surface modification. The harness (Shore A) increased to the value of 45 after surface amendment. Dynamic mechanical analysis (DMA) provided insights into storage modulus, loss modulus, and tan δ, showing the impact of filler type and surface modification. The utilization of coupling agent-modified carbon black decreased [Formula: see text] from −24°C to −30°C. Thermal gravimetric analysis (TGA) indicated consistent thermal stability across compounds, while solvent resistance improved with surface modification, as evidenced by swelling ratios. The thermodynamic analysis underscored the importance of filler type and surface modification on compound elasticity and flexibility. Overall, precise selection and optimization of filler materials and surface modifications are crucial for tailoring rubber compound properties to meet specific performance requirements across applications, impacting various aspects including curing, mechanical, dynamic, thermal, solvent resistance, and thermodynamic parameters.
单独或混合使用改性炭黑和纳米二氧化硅对丁基橡胶(IIR)的硫化、机械和动态性能的影响
本研究评估了所开发的表面改性炭黑作为丁基橡胶(IIR)化合物混合填料的有效性,包括单独使用和与纳米二氧化硅结合使用两种情况。改性过程以及随后的偶联剂处理影响了关键的硫化特性,包括扭矩、交联密度、粘度、硬度和硫化时间。扫描电子显微镜(SEM)分析表明,表面改性改善了填料的分散性,提高了填料与橡胶的相容性。含有改性炭黑的化合物的Δ扭矩比其他化合物高出 13%。填料类型和表面改性对拉伸强度、断裂伸长率、模量、撕裂强度和硬度等机械性能有显著影响。表面改性后,线束(邵氏 A)增加到 45。动态机械分析(DMA)提供了对储存模量、损失模量和 tan δ 的深入了解,显示了填料类型和表面改性的影响。偶联剂改性炭黑的利用率从 -24°C 降至 -30°C[公式:见正文]。热重分析(TGA)表明,不同化合物具有一致的热稳定性,而耐溶剂性则随着表面改性的进行而提高,膨胀率就是证明。热力学分析强调了填料类型和表面改性对化合物弹性和柔韧性的重要性。总之,精确选择和优化填料材料和表面改性对于定制橡胶复合物性能以满足各种应用的特定性能要求至关重要,会对硫化、机械、动态、热、耐溶剂性和热力学参数等各个方面产生影响。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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