纳米炭粉改性苯并噁嗪树脂烧蚀性能研究  

Study on the ablative properties of polybenzoxazine resin modified with nano-carbon powder

作　　者：张世杰[1] 张炜[1] 郭亚林[1] 

机构地区：[1]西安航天复合材料研究所,陕西西安710025

出　　处：《热固性树脂》2008年第6期13-17,共5页Thermosetting Resin

摘　　要：为进一步提高苯并噁嗪树脂的烧蚀性能,采用纳米炭粉对其进行了改性研究。采用透射电镜(TEM)和场发射电子显微镜(SEI)观察了纳米炭粉在苯并噁嗪树脂的中的分散状态;通过热失重分析研究了纳米炭粉质量分数对苯并噁嗪树脂残炭率的影响并测试了烧蚀性能;同时采用X-射线衍射法(XRD)对炭层结构进行了分析。结果表明,质量分数为10%纳米炭粉的改性苯并噁嗪800℃残炭率可达到63.6%,该体系700℃炭化后的压缩强度为纯树脂的3.8倍。改性后的苯并噁嗪树脂炭化层结构致密,裂纹小,石墨化度与炭结构的有序度大大提升,最终使树脂的耐烧蚀性能与抗热震性获得改善。The nano - carbon powder was used to improve the ablative properties of polybenzoxazine resin. The dispersion state of nano - carbon powder in polybenzoxazine resin was observed by TEM and SEI. The effect of nano - carbon powder contents on the char yield was investigated by TGA and the ablative properties were tested. The structure of char layer was analyzed by XRD. The results showed that the char yield at 800℃ of polybenzoxazine resin with 10wt% nano- carbon powder was up to 63.6% and the compressive strength was 3.8 times of the pure resin after charring at 700 ℃. The structure of the modified char layer was dense and the crack was small. The ablative property and thermal shock resistance were improved because of the great promotion of graphitization degree and carbon structure.

关 键 词：苯并嗯嗪树脂 纳米炭粉 改性 烧蚀性能 

分 类 号：TQ323.1[化学工程—合成树脂塑料工业] TB383[一般工业技术—材料科学与工程]