【摘要】 含铍SiC陶瓷纤维是一种新型的高性能SiC纤维,而优质含铍聚碳硅烷先驱体（PBCS）的合成是得到该种纤维的重要保证。以乙酰丙酮铍（Be（acac）₂）和聚碳硅烷（PCS）为原料制备得到PBCS,并对其合成机理进行了深入研究,采用PCS和石蜡分别与Be（acac）2进行对比反应,用GC-MS对反应小分子产物进行分析,确定了Be（acac）₂与PCS的成键反应实际是Be与Si—H键反应,C—H键没有参与含铍键的形成反应;根据小分子反应产物的生成途径,合理分析了PBCS的合成反应原理。更多还原

【Abstract】 SiC ceramic fiber containing Be is a new kind of high performance fiber material,and high quality polyberylliumcarbonsilane polymer（PBCS）is an important guarantee for this kind of fiber.In this research,Be（acac）₂ and PCS were used to synthesize PBCS to study the mechanism of synthesis reaction.Results of reactions between Be（acac）₂ with PCS,Be（acac）₂ with paraffin respectively showed that the reaction between Be（acac）₂ and PCS is due to the Si—H bond rather than C—H bond.Besides,according to the products,we speculate the formation path of the PBCS chemical bond rationally.更多还原