Nanofiller Structure and Reinforcement in Model Silica/Rubber Composites: A Quantitative Correlation Driven by Interfacial Agents
Nanofiller Structure and Reinforcement in Model Silica/Rubber Composites: A Quantitative Correlation Driven by Interfacial Agents
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DOI：
10.1021/ma500582p
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发表时间：
2014-07
期刊：
影响因子：
5.5
通讯作者：
Adrien Bouty;L. Petitjean;Christophe Degrandcourt;J. Gummel;P. Kwaśniewski;F. Meneau;F. Boué;M. Couty;J. Jestin
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文献类型：
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作者：
Adrien Bouty;L. Petitjean;Christophe Degrandcourt;J. Gummel;P. Kwaśniewski;F. Meneau;F. Boué;M. Couty;J. Jestin
我们报告了一个完整的分析模型二氧化硅/丁苯橡胶（SBR）纳米复合材料，包括填料结构和机械增强之间的直接和定量的相关性。我们比较了两种不同的样品加工方法：具有明确的胶体二氧化硅的溶剂铸造路线和与工业二氧化硅粉内部混合的制造工艺。利用SAXS/TEM在倒向空间和正向空间对填料的多尺度色散进行了表征。用振荡剪切法测定了其力学性能。我们评估了两种聚合物-填料界面添加剂对填料分散性的影响：不同颗粒浓度的涂层剂和偶联剂。利用简单的解析函数，我们成功地模拟了填料的分散。令人惊讶的是，无论是样品加工、溶剂铸造还是内部混合，我们都得到了相同的总体趋势。初生颗粒形成分形初生聚集体。
We report a complete analysis of model silica/styrene–butadiene rubber (SBR) nanocomposites including a direct and quantitative correlation between the filler structure and the mechanical reinforcement. We compared two different ways of sample processing: a solvent casting route with well-defined colloidal silica and the manufacturing process of internal mixing with industrial silica powder. The multiscale filler dispersion was characterized with a combination of SAXS/TEM in both reciprocal and direct space. The mechanical properties were determined with oscillatory shear measurements. We evaluated the influence of two polymer-filler interfacial additives on the filler dispersion: a coating agent and a coupling agent for different particle concentrations. Using simple analytical functions, we succeed in modeling the filler dispersion. We obtained surprisingly the same general trend whatever the sample processing, solvent casting, or internal mixing. The primary particles form fractal primary aggregates in...