有机硅基耐烧蚀材料的研究

以室温硫化硅橡胶为基材，采用联二脲、芳纶纤维作为配合剂制成了固体火箭发动机用耐烧蚀材料，讨论了联二脲和芳纶对材料烧蚀率和机械性能的影响。结果表明，联二脲、芳纶纤维单独和混合使用都能够降低烧蚀材料的烧蚀率。当以7．5／0．5的比例混合使用时，能够获得最低的烧蚀率（线烧蚀率和质量烧蚀率分别为0．146mm/s和0．153g/s)。由于联二脲、芳纶纤维与室温硫化硅橡胶的相容性较差，材料的机械性能有所下降。

Study on Property of Silicone- based Ablation Resistant Material

s:RTV rubber was used as basic material in the preparation of ablation material for solid rocket motor. LDA/ Kevlar were added to the ablation material. The ablation rate and mechanical property of the material were tested. The results showed that LDA/ Kevlar could decrease the ablation rate of the ablative material. The lowest ablation rate was made when bakelite/ asbestine were added together in a certain proportion. The mechanical properties decreased because of the bad compatibility between RTV rubber and filler.