摘要
采用含卤-锑的阻燃剂,芳纶纤维代替石棉纤维,研制了耐烧蚀的丁腈橡胶绝热层新配方(D210配方)。试验研究了芳纶纤维用量、卤-锑阻燃剂用量及纤维排布方向对绝热层烧蚀性能的影响;研究了增塑剂用量对绝热层玻璃化温度的影响。结果表明,芳纶纤维用量为4份时,绝热层烧蚀性能最佳,线烧蚀率为0.051 mm/s,质量烧蚀率为0.069 g/s;在选定的阻燃剂用量范围内,阻燃剂对绝热层烧蚀性能影响不大;所选增塑剂用量为20份时,玻璃化温度Tg可达-40℃。试验还对绝热层力学性能、硬度、粘接性能、比热容、导热等性能进行了测试,表明新研制的耐烧蚀橡胶有可能成为替代传统的石棉纤维和丁腈橡胶体系的固体火箭发动机燃烧室内绝热层。
A new N BR insulation formula named D210 was prepared by using fire retardant agent containing halogen-Sb and replacing asbestos fiber with aramid fiber. The effects of the content of fire retardant agent and aramid fiber and fibers orientation on erosion properties of the insulation were investigated. The effect of the content of plasticizer on Ts of NBR insulation was also studied. The results show that the optimum linear erosion rate is 0：051 mm/s,and mass erosion rate is 0.069 g/s when the content of aramid fiber is in 4 portions. Fire retardant agent within chosen content range has less effect on erosion properties of the insulation. When the content of plasticizer is in 20 portions, Tg of NBR insulation can reach - 40 ℃. In addition, mechanical performance, hardness, adhesion,specific heat capacity and heat conduction coefficient were tested respectively. The results show that the developed NBR ablation insulation can be used to replace traditional asbestos-NBR system for inner insulation of solid rocket motors.
出处
《固体火箭技术》
EI
CAS
CSCD
北大核心
2008年第6期635-637,641,共4页
Journal of Solid Rocket Technology
