白炭黑补强硅橡胶材料的宏细观力学行为研究

STUDY ON MACROSCOPIC AND MICROSCOPIC MECHANICAL BEHAVIOR OF SILICA REINFORCED SILICONE RUBBER COMPOSITES

首先通过对白炭黑-硅橡胶材料微观结构的观察,研究了白炭黑和硅橡胶的界面结合情况和补强机理;在此基础上,通过引入表征白炭黑和硅橡胶基体界面力学特性的界面断裂能函数和反映颗粒补强效果的无量纲量,得到了复合材料性能和界面断裂能、颗粒含量之间关系的解析表达式;并通过相关实验数据与理论值的比较,验证了解析表达式的准确性。该方法为硅橡胶和硅泡沫材料的结构优化和性能评估提供了理论基础和技术支持。

Through observing and analyzing the microstructure of the materials by SEM,the interfacial bonding and Strengthen Mechanism of silicone rubber reinforced by silica were investigated. Then,based on micro-mechanics and fracture mechanics theories,and the fracture energy of interface between silica and silicone rubber was introduced to reflect the interfacial mechanical characteristics,then the quantity was deduced that could reflect the reinforced effect of different silica feature and different silica content,and the analytical expression of reinforced material properties with fracture energy and the silica volume fraction were respectively observed. To prove the accuracy of the analytical expressions,the relative experimental data with theoretical curve were compared. This study provides the theoretical basis and technical support for the structural optimization and performance evaluation of silicon rubber and silicone foam material.