The correlation between aggregates and bound rubber structures in silicone rubbers (S(phr)) with various silica fractions (Φ_Si) has been investigated by contrast matching small-angle neutron scattering (SANS), swelling kinetics, and low-field nuclear magnetic resonance (NMR). Mixed solvents with deuterated cyclohexane fractions of 4.9% and 53.7% were chosen to match the scattering length densities of the matrix (S_MP(phr)) and the filler (S_MS(phr)), respectively. All the data consistently suggest that: (i) There is a critical threshold Φ_Si^c between 10 and 30 phr; below Φ_si^c, the isolated aggregates are dominant, while beyond Φ_si^c, some rubber fraction is trapped among the agglomerate; (ii) Φ_sr-independent thicknesses around 7.5 nm (NMR) and 8.6 nm (SANS) suggest that the bound rubber formation is determined by inherent properties of the components, and the power-law around 4.2 suggests an exponential changed gradient density of the bound rubber; (iii) S_MS(80) presents a bicontinuous bound rubber with three characteristic lengths of 41, 100, and 234 nm. The expanded correlation length, a 20 nm smaller aggregate sizes suggest that such existent bicontinuous network in dry samples with less Φ_Si is kind of impacted by swelling. With the obtained bound rubber models, the reinforcing mechanism of filled silicone rubber is elucidated.

在硅橡胶聚集体和结合橡胶结构之间的相关性（S（PHR））与各种二氧化硅的级分（Φ_的Si）相反匹配小角中子散射（SANS）已经被研究，肿胀动力学和低场核磁共振（NMR）。选择氘化环己烷分数分别为4.9％和53.7％的混合溶剂，以分别匹配基质（S _MP（phr））和填料（S _MS（phr））的散射长度密度。所有的数据一致地表明：（ⅰ）有一个临界阈值Φ_的Si ^Ç 10和30份之间; 下面Φ _SI ^Ç，分离的聚集体是占主导地位，而超出Φ_si ^c，一些橡胶馏分被困在附聚物中。（ⅱ）Φ _SR约7.5纳米（NMR）和8.6纳米（SANS）非依赖性的厚度表明，结合橡胶形成是通过组分的固有性质确定，并且周围4.2幂律建议的指数变化的梯度密度粘合橡胶 （iii）S _MS（80）提供了一种双连续粘结橡胶，具有41、100和234 nm的三个特征长度。膨胀相关长度，一个20nm的较小的聚集体尺寸建议干燥样品中，这样的双连续存在的网络用较少Φ_的Si是种通过溶胀影响。利用获得的结合橡胶模型，阐明了填充硅橡胶的增强机理。