宇航材料工艺2025，Vol.55Issue(2)：85-91,7.DOI:10.12044/j.issn.1007-2330.2025.02.011
白炭黑结构对加成型液体硅橡胶流变性能和力学性能的影响
Effect of Silica Structure on Rheological and Mechanical Properties of Addition Liquid Silicone Rubber
赵宇航 1余凤湄 2谭龙飞 3芦艾 2康明1
作者信息
- 1. 西南科技大学,绵阳 621000
- 2. 中国工程物理研究院化工材料研究所,绵阳 621900
- 3. 中国科学院理化技术研究所,北京 100190
- 折叠
摘要
Abstract
In order to solve the contradiction between processing fluidity and mechanical strength of silica reinforced liquid silicone rubber,three kinds of fumed silica with typical structural characteristics were used as reinforcing fillers of silicone rubber.By means of particle size analysis of silica,rheological and mechanical properties test of silicone rubber and atomic force microscope analysis,the effects of surface characteristics and aggregation structure on rheological and mechanical properties of silicone rubber were comparatively studied and analyzed.The results of particle size analysis and atomic force microscope analysis show that fumed silica HT200 with organic surface modification and optimized aggregation structure has smaller aggregation structure size and more uniform particle size distribution.The results of rheological and mechanical properties analysis show that HT200 has the weakest tackifying effect on liquid silicone rubber among the three kinds of silica.When the amount of HT200 is 50 phr,the viscosity of the compound is 1045 Pa·s,which is significantly lower than that of the liquid silicone rubber filled with IPC300 and R812S with the same amount.Meanwhile,the silicone rubber has excellent tensile properties,and the tensile strength and elongation at break are 8.2 MPa and 1590％respectively.The results show that the organic modification of silica surface and the optimization of aggregation structure can obviously improve the dispersion uniformity of silica in liquid silicone rubber,reduce the tackifying effect of silica,and effectively coordinate the contradiction between rheological properties and mechanical properties of liquid silicone rubber,which has important reference significance for the design of high-performance liquid silicone rubber formula.关键词
白炭黑/液体硅橡胶/流变性能/硫化性能/力学性能Key words
Silica/Liquid silicone rubber/Rheological properties/Vulcanization properties/Mechanical properties分类
化学化工引用本文复制引用
赵宇航,余凤湄,谭龙飞,芦艾,康明..白炭黑结构对加成型液体硅橡胶流变性能和力学性能的影响[J].宇航材料工艺,2025,55(2):85-91,7.
