可瓷化三元乙丙橡胶的制备及烧蚀性能

Preparation and Ablation Properties of Ceramifying Ethylene-Propylene-Diene Monomer

摘要: 根据云母粉对聚合物材料的瓷化阻燃作用，以三元乙丙(EPDM)为基体，通过添加云母粉，在高温有氧环境下，使云母粉发生熔融，与裂解碳层发生物理交联，形成致密陶瓷复合结构，达到高温耐烧蚀的目的。本文通过形貌分析(SEM)、质量烧蚀率、X射线衍射仪(XRD)，研究不同温度段下，云母粉对EPDM烧蚀性能的影响，发现在1100˚C，云母粉形成了以莫来石为主晶相的陶瓷层，获得较好的烧蚀性能。

Abstract: Based on the ceramified flame-retardant effect and ceramification of mica on polymers, by adding mica to the EPDM matrix, a dense ceramic composite structure was formed by physical crosslinking the melted mica with the cracked carbon layer under high temperature aerobic conditions. So the high temperature ablation resistant can be achieved. We studied the impact of mica on EPDM ablation performance under different temperature ranges by morphology analysis (SEM), mass ablation rate and X-ray diffraction (XRD). The results showed that mica formed ceramic layer with mullite as the main crystal phase in 1100˚C, and obtained a better ablative resistant performance.