Acrylonitrile rubber (NBR) composites filled with barium titanate (BT) were prepared using an internal mixer and a two-roll mill. Also, a secondary filler, namely carbon nanotubes (CNT), was added in order to find a potential synergistic blend ratio of BT and CNT. The cure characteristics, tensile and dielectric properties (dielectric constant and dielectric loss) of the composites were determined. It was found that NBR/BT composites with CNT secondary filler, at a proper BT:CNT ratio, exhibited shorter scorch time (t_s1) and cure time (t_c90) together with superior tensile properties and reinforcement efficiency, relative to the one with only the primary filler. In addition, the NBR/BT-CNT composite with 80 phr BT and 1–2 phr CNT had dielectric constant of 100–500, dielectric loss of 12–100 and electrical conductivity below 10⁻⁴ S/m together with high thermal stability. Thus, with a proper BT:CNT mix and filler loading, we can produce mechanically superior rubber composites that are easy to process and low-cost, for flexible dielectric materials application.

使用内部混合器和两辊磨机制备填充有钛酸钡（BT）的丙烯腈橡胶（NBR）复合材料。另外，添加辅助填料，即碳纳米管（CNT），以发现BT和CNT的潜在协同混合比。测定了复合材料的固化特性，拉伸性能和介电性能（介电常数和介电损耗）。发现以适当的BT：CNT比，具有CNT辅助填料的NBR / BT复合材料表现出更短的焦烧时间（t _s1）和固化时间（t _c90）相对于仅使用主要填充剂的拉伸性能和增强效率而言，它具有更高的拉伸性能和增强效率。此外，具有80 phr BT和1-2 phr CNT的NBR / BT-CNT复合材料的介电常数为100-500，介电损耗为12-100，电导率低于10 ^-4 S / m，同时具有很高的热稳定性。因此，通过适当的BT：CNT混合物和填料填充量，我们可以生产机械性能优异的橡胶复合材料，这些材料易于加工且成本低廉，适用于柔性介电材料应用。