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新型高速巡航导弹要求材料能承受650℃左右的高温,目前所用的聚酰亚胺不能承受这样的高温,而聚苯并咪唑(PB I)做成的复合材料在650℃下短期使用具有令人满意的性能,其不仅使弹体的承温能力得到明显提高,而且还使弹体的结构质量得到大幅降低,是研制超音速导弹的较为理想的结构材料。介绍了聚苯并咪唑的发展概况,聚合机理以及合成聚苯并咪唑树脂的主要单体和聚合工艺,对聚苯并咪唑的应用及发展动向也作了阐述。
The new high-speed cruise missiles require materials that can withstand temperatures around 650 ° C. Polyimide, currently used, can not withstand such high temperatures, whereas PBIs have shortcomings at 650 ° C Satisfactory performance, which not only significantly enhance the temperature capability of the projectile, but also greatly reduce the structural quality of the projectile, making it an ideal structural material for the development of supersonic missiles. The development of polybenzimidazole, the polymerization mechanism and the main monomers and polymerization process of polybenzimidazole were introduced. The application and development trend of polybenzimidazole were also described.