Hydroxyl-terminated polybutadiene (HTPB) liquid is used to mediate the dispersity of fumed silica in cis-polybutadiene rubber (BR) to prepare nanocomposites. The introduction of HTPB promotes the dispersion of both hydrophilic and hydrophobic silicas (A200 and R974), which improves the reinforcement efficiency, delays the onset strain amplitude of nonlinear softening and enlarges the high-order harmonics in the nonlinearity region. Influence of HTPB on the linear and nonlinear rheological responses are well accounted for by data superposition on the basis of the rheological responses of the matrix. It is evidenced for the first time that the rheological nonlinearity may be enhanced in the case of improved filler dispersity. This is understandable taking the intrinsic nonlinearity of the matrix and the strain amplification effect induced by filler into consideration.

羟基封端的聚丁二烯（HTPB）液体用于介导气相二氧化硅在顺式中的分散性-聚丁二烯橡胶（BR）以制备纳米复合材料。HTPB的引入促进了亲水性和疏水性二氧化硅（A200和R974）的分散，从而提高了增强效率，延迟了非线性软化的起始应变幅度，并扩大了非线性区域中的高次谐波。在矩阵的流变响应的基础上，通过数据叠加可以很好地说明HTPB对线性和非线性流变响应的影响。首次证明，在改善填料分散性的情况下，流变性可能会增强。考虑到基质的固有非线性和由填料引起的应变放大效应，这是可以理解的。