玄武岩纤维/ 氨酚醛树脂防热材料的性能

采用丁异戊橡胶作为主体材料,从补强体系、硫化体系和增塑剂三个方面分析了它们对橡胶高低 温性能、耐老化性能和耐压性能的影响。粒径小、结构度高的炭黑和气相白炭黑并用可有效改善橡胶的力学性 能;硫磺含量在0. 8% ~1. 3%使得硫化橡胶既具备较好的高低温性能又兼顾较好的耐老化性能;增塑剂可有 效调整橡胶硬度和耐压性能。并对研制的丁异戊橡胶弹性材料及其柔性接头构件耐高低温性能及耐压性能进 行分析。结果表明,弹性材料高低温剪切性能及耐压性能表征结果能初步反映柔性接头构件的摆动性能及耐 压性能。

Properties of Basalt Fiber Reinforced Thermal Protection Materials

Aimed at the development status of solid rocket motor nozzle thermal protection materials, basalt fiber was used to produce phenolic resin composites. Mechanical property, thermal property and ablative property were tested. The micro-morphology of specimens after test are investigated by SEM. The results show that the density is less than 1.75 g/ cm3,the max compress strength in axial direction is up to 335 MPa, the thermal conductivity in axial direction and radial direction is (0.3 to 0.4)W/ (m·K). The requirements of nozzle thermal protection materials are satisfied.