摘要
聚对苯撑苯并二噁唑(PBO)因其分子链刚性结构以及纤维表面化学惰性导致其力学性能较差,即使通过环氧树脂增强,其综合性能仍然不能达到航空航天行业对耐高温材料的要求。高强、高模及耐高温树脂聚酰亚胺的引入,使PBO纸基复合材料的力学性能和耐高温性能获得较大提高,而其制品的力学性能受到成型加工工艺的影响,采用100℃预固化,250℃,20MPa热压成型的工艺将获得最佳力学性能,其裂断长达到12km。通过DSC及TGA分析,其玻璃化转变温度及初始分解温度分别为269℃及555℃,有望作为航空航天等领域耐高温结构材料的使用。
Although epoxy resin is commonly used for reinforcement of composite material, the temperature for its long-time use is below 130℃. In order to increase the use temperature and mechanical properties of PBO paper based composite, advanced composite material using polyimide as reinforcing resin has been studied. The properties of polyimide composite material is usually determined by many factors. While precuring at 100℃ and hot pressing at 250℃, its breaking length will be the highest as 12000m. Moreover, DSC and TGA analysis results showed that higher glass-transition temperature of 269 ℃ and initial decomposition temperature of near 555 ℃ are obtained.
出处
《中国造纸》
CAS
北大核心
2008年第12期28-31,共4页
China Pulp & Paper
