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制备了三相纳米复合材料SBR/ZDMA/气相法白炭黑。采用了两种气相法白炭黑,U-fumed silica是一种未改性的气相法白炭黑,M-fumed silica是一种采用硅烷偶联剂Si69表面改性的气相法白炭黑。主要研究了气相法白炭黑和ZDMA之间的协同补强效应。研究结果显示,单独添加同样份数的改性气相法白炭黑和未改性气相法白炭黑对硫化胶物理机械性能的影响不同,改性气相法白炭黑的效果明显优于未改性气相法白炭黑。单独添加气相法白炭黑,体系的物理机械性能仍然维持在较低值。当同时添加气相法白炭黑和ZDMA时,会观察到明显的协同补强效应。交联密度和丙酮抽出试验表明对气相法白炭黑进行表面改性和在体系中添加ZDMA均会减弱气相法白炭黑表面羟基的影响。扫描电镜显示改性后气相法白炭黑在SBR中的分散性得到提高。在体系中添加ZDMA会提高气相法白炭黑的分散性。
Three-phase nanocomposites SBR / ZDMA / fumed silica were prepared. Uses two fumed silica, U-fumed silica is an unmodified fumed silica, M-fumed silica is a fumed silica that has been surface-modified with silane coupling agent Si69. The synergistic reinforcing effect between fumed silica and ZDMA is mainly studied. The results show that the addition of the same number of modified fumed silica and unmodified fumed silica have different effects on the physical and mechanical properties of the vulcanizates. The modified fumed silica is better than the unmodified fumed silica Gaseous fumed silica Addition of fumed silica alone, the physical and mechanical properties of the system is still maintained at a low value. When both fumed silica and ZDMA were added simultaneously, significant synergistic effects were observed. Crosslinking density and acetone extraction tests showed that the surface modification of the fumed silica and the addition of ZDMA to the system all decreased the hydroxyl groups on the fumed silica surface. Scanning electron microscopy showed that the dispersibility of modified fumed silica in SBR was improved. Addition of ZDMA to the system increases the dispersibility of fumed silica.