摘要
以三氯化硼、三乙胺为原料,在氮气保护气下,经低温反应合成了配位键化合物Et3NBCl3,再与(Me3Si)2NH反应,得到了中间产物(Me2Si)2NBCl2和(Me2Si)2NB(Cl)NHSiMe3,进而通过热缩合成环和高分子化后,获得了具有B、N六元环结构的BN先驱体.合成的BN先驱体,软化点为40～50℃左右,且热处理后软化点的温度可提高至60～70℃左右,可纺性能良好.获得的淡黄色、半透明且表面光滑的先驱体丝,在氮气中热分解至1500℃,获得了含有少量Si3N4和SiC的BN粉体,陶瓷转化率为38%.
Several compounds:Et3NBCl3,(Me3Si)2NBCl2,(Me3Si)2NB(Cl)NHSiMe3 are synthesized from BCl3,Et3N and (Me3Si)2NH in N2. The structures of these products are discussed by means of GCMS and element analysis. A spinable BN precursor is obtained with a softening point of 40～50 ℃,which can be changed to 60～70 ℃ by heat treatment. A kind of semitransparent BN precursor fibre is prepared. The ceramic yield of the BN precursor is 38% after pyrolysis at 1 500 ℃ in N2.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2003年第2期201-204,共4页
Journal of Xi'an Jiaotong University
