Insights into the reinforcement and mechanism of silicone mold rubber co-modified with WCB and MMQ resin
Insights into the reinforcement and mechanism of silicone mold rubber co-modified with WCB and MMQ resin
复制标题
DOI：
10.1088/2053-1591/abe73f
复制
发表时间：
2021-03-01
影响因子：
2.3
通讯作者：
Zhang, Hongxi
中科院分区：
文献类型：
--
作者：
Hao, Wenli;Zeng, Hehua;Zhang, Hongxi
开发具有优异力学性能和热稳定性的缩合室温硫化硅橡胶（C-RTV）对于制备高性能绝缘材料和橡胶制品具有重要的现实意义。在这项工作中，通过在C-RTV硅模具橡胶（C-RTV/WMMQ）中添加白炭黑（WCB）和不同比例的甲基MQ（MMQ）有机硅树脂，成功制备了新型硅橡胶。详细研究了所制备样品的机械性能、尺寸热稳定性和热分解温度。与原始C-RTV相比，WCB添加量为15%时，样品的拉伸强度从0.44 MPa提高到3.9 MPa。当引入 1% MMQ 时，拉伸强度进一步增加至 4.4 MPa，表明除了尺寸热稳定性和分解温度的提高之外，补强率还提高了 12.8%。基于实验结果，提出了一种可行的协同效应和相容机制，即除了WCB的刚性结构外，MMQ树脂和C-RTV之间的界面上还形成氢键，从而在聚合物基体中形成致密的交联网络结构。
The exploitation of condensation room-temperature vulcanized silicone rubber (C-RTV) with excellent mechanical properties and thermal stability is of great practical significance in the preparation of insulation materials and rubber products with high performance. In this work, novel silicone rubber was fabricated successfully by adding white carbon black (WCB) and different percentages of methyl MQ (MMQ) silicone resin to C-RTV silicone mold rubbers (C-RTV/WMMQ). The mechanical properties, dimensional thermal stabilities, and thermal decomposing temperatures of the as-prepared samples were investigated in detail. Compared to the primitive C-RTV, the tensile strength of the sample with the WCB adding an amount of 15% increased from 0.44 MPa to 3.9 MPa. When the 1% MMQ was introduced, the tensile strength further increased to 4.4 MPa, suggesting a 12.8% reinforcement rate in addition to the improvements in the dimensional thermal stabilities and decomposing temperature. Based on the experimental results, a feasible synergistic effect and compatibility mechanism was proposed that hydrogen bond formed on the interface between MMQ resin and C-RTV in addition to the rigid structure of WCB, and thus led to a dense crosslinking network structure in the polymer matrix.