【摘要】 针对某型号固体火箭发动机的防热要求,采用芳纶纤维、卤锑阻燃体系研制了新三元乙丙橡胶绝热层,配方中加入不饱和羧酸金属盐和某烷基酚醛树脂,拉伸强度和断裂伸长率分别提高了3MPa和200%。同时采用纳米陶瓷粉体提高了碳层的致密性,线烧蚀率由原来的0.12~0.14mm/s,降为0.086~0.12mm/s,最终研制的J210-8绝热层已成功应用于30s固体火箭发动机的燃烧室防热中。更多还原

【Abstract】 New EPDM insulation is prepared by using aramid fiber and halogen Sb-containing flame retardant system to satisfy the need of heat-protection of some solid rocket motor.In the process of the formula preparation,unsaturated metal carboxylic acid and alkyl-phenolic resin are added.Stretch strength and elongation at break are increased by 3 MPa and 200% respectively.In the meantime, the compactness of the remainder carbon layer is enhanced and the linear ablation rate is decreased from 0.12～0.14 mm/s to 0.086～0.12 mm/s by adding some nano-ceramic powder to the insulation formula.J210-8 insulation developed by our institute has good performances and is successfully applied in chamber heat-insulation of 30 s solid rocket motor.更多还原