新型聚硼硅氮烷杂化树脂的制备研究

Study on Preparation of a Novel Hybrid Resin from Polyborosilazane

以聚硼硅氮烷(PSNB)、N-乙烯基吡咯烷酮(NVP)为原料,由过氧化二异丙苯(DCP)引发自由基共聚合反应,制备了聚硼硅氮烷(PSNB/NVP)杂化树脂。采用差示扫描量热仪、热失重仪、红外光谱仪、平板流变仪等对杂化树脂的热性能、固化过程、流变行为等进行测试。结果表明,随着PSNB与NVP的质量比的提高,杂化树脂的热稳定性升高,PSNB与NVP质量比为20/80的杂化树脂在热质量损失率达到为5%时的温度较聚N-乙烯基吡咯烷酮提高近200℃;由杂化树脂高温裂解可得到硅硼碳氮多孔陶瓷,其孔尺寸及分布极不均匀。

A novel polyborosilazane （PSNB）and NVP hybrid resin was prepared by free radical copolymerization of PSNB and 1-vinyl-2-pyrrolidinone with the initiation of dicumyl peroxide. The thermal properties,curing behavior and rheological properties were characterized by DSC,TGA,FT IR and parallel plate rheometer. The thermal stability of the hybrid resin increased with increasing proportion of PSNB. The temperature of the 5% mass loss of the hybrid resin was increased about 200℃ with 20% weight percent of PSNB. SiBCN porous ceramics were prepared by pyrolysis of the hybrid resin under high temperature with the uneven pore size and distribution.