Moretto Enzo, Yan Chuanyu, Dieden Reiner, Steiner Pascal, Duez Benoît, Lenoble Damien, Thomann Jean-Sébastien
MRT Department, Luxembourg Institute of Science and Technology, 41 Rue du Brill, L-4422 Belvaux, Luxembourg.
Goodyear S.A, Avenue Gordon Smith, L-7750 Colmar-Berg, Luxembourg.
Polymers (Basel). 2022 Apr 20;14(9):1676. doi: 10.3390/polym14091676.
Silica fillers are used in various nanocomposites in combination with silanes as a reinforcing filler. In tire technology, silica is generally functionalized before (pre-treated) or during mixing (in-situ silanization or post-treated). In both cases, a soft base catalyst (e.g., triethylamine or diphenyl guanidine, DPG) is typically used to accelerate and increase the yield of the silane/silica coupling reaction. In this study, we investigated how pre-treatments of silica particles with either strong amine or hydride bases impact the silanization of silica prior to or during SBR mixing for silica-rubber nanocomposite fabrication. Our findings are supported by molecular characterization (solid state Si NMR, H NMR and TGA), and scanning electron microscopy. In addition, the impact of these silica pre-treatments on a nanocomposite's mechanical properties was evaluated using dynamic mechanical analysis (DMA).
二氧化硅填料作为增强填料，与硅烷结合用于各种纳米复合材料中。在轮胎技术中，二氧化硅通常在混合前（预处理）或混合过程中（原位硅烷化或后处理）进行功能化处理。在这两种情况下，通常使用软碱催化剂（如三乙胺或二苯基胍，DPG）来加速并提高硅烷/二氧化硅偶联反应的产率。在本研究中，我们研究了用强碱胺或氢化物碱对二氧化硅颗粒进行预处理，在制备二氧化硅-橡胶纳米复合材料的丁苯橡胶（SBR）混合之前或期间，如何影响二氧化硅的硅烷化。我们的研究结果得到了分子表征（固态硅核磁共振、氢核磁共振和热重分析）以及扫描电子显微镜的支持。此外，使用动态力学分析（DMA）评估了这些二氧化硅预处理对纳米复合材料力学性能的影响。
