聚硅硼氮烷的流变性能研究  

Study on rheological properties of polyborosilazane

作　　者：彭雨晴[1] 牟世伟[1] 王征辉[1] 韩克清[1] 余木火[1] 

机构地区：[1]东华大学材料科学与工程学院纤维材料改性国家重点实验室,上海201620

出　　处：《合成纤维工业》2014年第1期5-8,共4页China Synthetic Fiber Industry

基　　金：国家自然科学基金项目(20704005和90916025)

摘　　要：以硅硼氮烷为原料,在自制的聚合纺丝一体化设备中,缩聚反应连续化制备聚硅硼氮烷（PBSZ）;探讨了PBSZ的流变特性,并对其初生纤维的结构与形貌进行了表征.结果表明：聚合反应釜一次性可制备10 kg的聚合物,在高纯氮气保护下进行聚合,得到了直径为25～30μm的不含有Si—O—Si键的初生纤维;通过动态流变测试,聚合时间为48～72 h,在一定温度下PBSZ均能表现出可纺性,且都属于剪切变稀的非牛顿流体.Polyborosilazane （PBSZ） was prepared by continuous polycondensation reaction using borosilazane （SiBN （c）） as raw material on a self-made polymerization-spinning integrated equipment. The rheological behavior of PBSZ was discussed. And the structure and morphology of the as-spun fiber were characterized. The results showed that the polymerization reactor can syn- thesize 10 kg polymer in one large-scale production, the as-spun fiber of 25 - 30 μm in diameter without Si-O-Si bond can be produced under the protection of high-purity nitrogen. The dynamic rheological test showed that PBSZ exhibited fairly good spin- nability at a specific temperature and belonged to shear thinning non-Newtonian fluid as the polymerization time was 48 -72 h.

关 键 词：聚硅硼氮烷 陶瓷纤维 流变性 连续化 熔融纺丝 

分 类 号：TQ343.41[化学工程—化纤工业]