Ryu Chang Seok, Kim Kwang-Jea
School of Chemical Engineering, Chonnam National University, Gwangju 61186, Korea.
DTR VMS Italy S.r.l., 25050 Brescia, Italy.
Polymers (Basel). 2022 Jul 1;14(13):2705. doi: 10.3390/polym14132705.
We reviewed the accelerators, the hydrolysis and condensation reaction mechanism of bifunctional alkoxy silane, and the mechanism of zinc ion in natural rubber (NR) composites. NR composites transform into thermoset composites after vulcanization reaction with help of sulfur and accelerators. Bifunctional alkoxy silanes chemically bond between NR and inorganic silica. For alkoxy silane coupling with silica surface, hydrolysis reaction takes first and then condensation reaction with hydroxyl group in silica takes place. With help of zinc ion the reaction efficiency increases significantly. Zinc ion, a smart material that increases accelerator synergy, mechanism for improvements of interfacial adhesion between NR and silica was revisited.
我们综述了促进剂、双官能烷氧基硅烷的水解和缩合反应机理以及锌离子在天然橡胶（NR）复合材料中的作用机理。NR复合材料在硫磺和促进剂的作用下通过硫化反应转化为热固性复合材料。双官能烷氧基硅烷在NR和无机二氧化硅之间形成化学键。对于烷氧基硅烷与二氧化硅表面的偶联，首先发生水解反应，然后与二氧化硅中的羟基发生缩合反应。在锌离子的作用下，反应效率显著提高。锌离子是一种能提高促进剂协同作用的智能材料，我们重新探讨了其改善NR与二氧化硅之间界面粘合性的机理。
