Exploiting arene-perfluoroarene interactions for dispersion of carbon black in rubber compounds
Exploiting arene-perfluoroarene interactions for dispersion of carbon black in rubber compounds
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DOI：
10.1016/j.polymer.2018.06.025
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发表时间：
2018-07
期刊：
影响因子：
4.6
通讯作者：
P. Raut;Nicole Swanson;A. Kulkarni;C. Pugh;S. Jana
中科院分区：
文献类型：
--
作者：
P. Raut;Nicole Swanson;A. Kulkarni;C. Pugh;S. Jana
偶联剂旨在通过在填料和橡胶相之间提供桥梁来促进填料的分散。研究了一种新型的物理偶联剂--聚丁二烯-接枝-五氟苯乙烯与聚五氟苯乙烯的混合物在炭黑增强丁苯橡胶(SBR)中改善橡胶-填料相互作用，抑制填料-填料网络，从而减少滞后的能力。炭黑的富电子芳环与偶联剂的贫电子五氟苯乙烯芳环参与了芳烃-全氟芳烃的相互作用。橡胶化合物中的SBR链与偶联剂的聚丁二烯主链具有亲和力。用拉曼光谱、透射电子显微镜、Zeta电位、比表面积和扫描电子显微镜分析了炭黑与偶联剂之间的相互作用。填料絮凝分析表明，偶联剂提高了分散性，降低了耗散能。由于偶联剂促进了更好的填料-橡胶相互作用，在60 °C下用损耗正切值量化的滞后损耗最高可减少12%。研究了PPFS接枝长度对接枝效果的影响。
Coupling agents are intended to promote filler dispersion by providing a bridge between the filler and the rubber phase. This study investigated the ability of a novel physical coupling agent, poly(butadiene-graft-pentafluorostyrene) in a mixture with polypentafluorostyrene, to improve rubber-filler interactions and suppress filler-filler networking in carbon-black-reinforced styrene-butadiene rubber (SBR), and thereby decrease hysteresis. The electron-rich aromatic rings of carbon black are involved in arene-perfluoroarene interactions with the electron-poor pentafluorostyrene aromatic rings of the coupling agent. The SBR chains in the rubber compound have an affinity for the polybutadiene backbone of the coupling agent. The interactions between carbon black and the coupling agent were analyzed using Raman spectroscopy, transmission electron microscopy, zeta potential measurements, surface area measurements, and scanning electron microscopy. Filler flocculation analysis showed that the coupling agent improves the dispersion and lowers the energy of dissipation. The hysteresis loss, quantified in terms of loss tangent values at 60 °C, was reduced by up to 12% due to the coupling agent's promotion of better filler-rubber interactions. The influence of the PPFS graft length was also studied.