摘要
以热硫化硅橡胶为基体,聚芳基乙炔、短切碳纤维、二氧化锆和碳纤维布为耐烧蚀填料,制备了耐烧蚀隔热硅橡胶复合材料,探究了耐烧蚀填料对复合材料的线烧蚀率和衬底温度的影响。结果表明,随着耐烧蚀填料的依次加入,复合材料的线烧蚀率下降、衬底温度降低,当聚芳基乙炔、短切碳纤维、二氧化锆和碳纤维布加入量均为10份(质量)时,所得复合材料的耐烧蚀隔热性能最佳,其线烧蚀率为0.043 mm/s,衬底温度为70℃。这主要是因为耐烧蚀填料和硅橡胶基体间发生了陶瓷化-炭化耦合反应,生成的陶瓷化物覆盖于碳纤维布表面形成致密的烧蚀层。
Silicone rubber composites with anti-ablation and thermal insulation properties were prepared with hot vulcanized silicone rubber as matrix,and polyarylacetylene,short carbon fiber,zirconia and carbon fiber cloth as anti-ablation fillers,and the effect of anti-ablation fillers on linear ablation rate and substrate temperature of the composites was investigated.The results showed that the linear ablation rate and substrate temperature of the composites were decreased with the sequential addition of the anti-ablation fillers.When the addition amount of polyarylacetylene,short carbon fiber,zirconia,and carbon fiber cloth were all 10 phr(mass),the resul-ting composite had the best anti-ablation and thermal insulation properties with a linear ablation rate of 0.043 mm/s and a substrate temperature of 70℃.This was mainly attributed to the ceramization-carbonization coupling reaction between the anti-ablation fillers and silicone rubber matrix,which led to the formation of a dense ablation layer that covered the surface of carbon fiber cloth.
作者
张丰
高景龙
刘艳辉
ZHANG Feng;GAO Jing-long;LIU Yan-hui(School of Material Science and Engineering,Shenyang Ligong University,Shenyang 110169,China)
出处
《合成橡胶工业》
CAS
2024年第6期503-506,共4页
China Synthetic Rubber Industry
基金
辽宁省教育厅高等学校基本科研项目(LJKMZ20220586)。
关键词
硅橡胶
耐烧蚀填料
隔热
线烧蚀率
衬底温度
陶瓷化-炭化耦合作用
silicone rubber
anti-ablation filler
heat insulation
linear ablation rate
substrate temperature
ceramization-carbonization coupling
