热防护材料的新进展──芳基乙炔共聚物的碳纤维增强材料

NEW ADVANCE OF HEATING RESISTANCE MATERIALS

芳基乙炔共聚物有很高的残碳率，在１０００℃高温下残碳率可达８５％～９０％。预聚物在０．７～１．４ＭＰａ压力下，于１５０～２００℃固化交联，固化过程中没有小分子物产生。共聚物对碳纤维有较好的粘接力，可以用缠绕、模压工艺制备固体火箭发动机的热防护构件。这是进入９０年代以后国内外烧蚀材料和碳／碳复合材料领域中的重大进展。〔１～３〕。

The Polyarylacetyleene (PAA)Resin is a highly crosslinked aromatic polymer.The principle advantage is high char yield(85%～95%).For the resin synthesis a controllable,low temperature technique,prepolymer cross linked at 150 200℃ and 0.7～1.4MPa pressure. Utilizing these resins fabrication process T300 carbon fabric/PAA composites have high char yield and good mechanical properties.It was an advance for ablation materals C/C compositie materials