硅硼氮纤维前驱体聚合物的扩链反应改性  

Modification of Precursor for SiBN Ceramic Fiber via Chain-Extending with a Flexible Telechelic Polymer

作　　者：胡建建[1] 牟世伟[1] 唐彬彬[1] 彭雨晴[1] 韩克清[1] 余木火[1] 

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

出　　处：《合成纤维》2014年第3期23-26,共4页Synthetic Fiber in China

基　　金：国家自然基金项目(90916025)

摘　　要：以柔性链遥爪聚合物[双(3-氨丙基)封端的聚二甲基硅氧烷(BTA-PDMS)]为扩链剂,对聚硅硼氮烷进行扩链反应改性,既可以提高其相对分子质量,又在刚性分子链中引入柔性链段,这显著改善了前驱体聚合物纤维的柔韧性,有望实现易退绕的目的。In this paper, polyborosilazane was modified by chain-extending reaction using a flexible teleche- lic polymer, bis（3-aminopropyl）-terminated polydimethylsiloxane （BTA-PDMS）, as chain extender. As a re- sult, flexible molecular chains was introduced into the precursor along with higher molecular weight. The toothed is expected to improve the flexibility of the precursor fibers which could be suitable for preparation of continuous SiBN ceramic fibers.

关 键 词：聚硅硼氮烷 前驱体纤维 柔性遥爪聚合物 扩链反应改性 高温陶瓷纤维 

分 类 号：TQ340.1[化学工程—化纤工业]