【摘要】 采用稀土铕配合物敏化荧光增强技术对沉淀法二氧化硅补强硅橡胶填料网络结构进行荧光标记,利用扫描电镜、激光扫描共聚焦显微镜、橡胶加工分析仪和固体流变分析仪对填充硅橡胶的填料网络结构、硫化性能以及动态力学性能进行测定与分析。通过激光扫描共聚焦显微镜可视化结果计算得到30~60份二氧化硅填充硅橡胶的填料网络连接率分别为31%,41%,58%和70%。硫化过程中表征填料-填料相互作用的最小转矩(ML)、应变扫描过程中Payne效应、剪切储能模量之差ΔG′(G′0-G′∞)都逐渐增大,表明随着填料份数的增加填充硅橡胶内部逐渐形成较强的填料网络结构,这与得到的填料网络连接率值一致,说明荧光标记技术与激光扫描共聚焦显微镜联用可以实现硅橡胶中填料网络结构的可视化。更多还原

【Abstract】 The filler network structure of the silica-reinforced silicone rubber was simulated by using the rare earth europium complex sensitized fluorescence enhancement technique.The filler network structure,curing performance and dynamic mechanical properties of the silica-reinforced silicone rubber were characterized by scanning electron microscopy,laser scanning confocal microscopy,rubber processing analyzer and solid rheological analyzer.The filler network connection rates of 30-60 parts of silica-filled silicone rubber were 31%,41%,58% and 70%,respectively,visualized by laser scanning confocal microscopy.The minimum torque(ML),characterization of filler-filler interaction,during the vulcanization process,the Payne effect and the shear storage modulus differenceΔG′(G′0-G′∞)in the strain sweep process were gradually increased.The results show that the filler network structure is gradually formed inside the silicone rubber with the increase of fillers,which is consistent with the obtained filler network connection rate,indicating that the combination of fluorescent labeling and laser scanning confocal microscopy can realize the visualization of the filler network structure in the silicone rubber.更多还原