聚铝碳硅烷的流变性和纺丝性研究  

Study on the Rheology and Spinnability of Polyaluminocarbosilane

作　　者：赵大方[1,2] 王海哲[1] 胡天娇[1] 李效东[1] 

机构地区：[1]国防科技大学航天与材料工程学院,湖南长沙410073 [2]装备指挥技术学院航天装备系,北京101416

出　　处：《国防科技大学学报》2009年第6期144-148,共5页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(59972042)

摘　　要：采用单孔纺丝装置对不同铝含量的聚铝碳硅烷（PACS）的流变性和流变性进行研究。结果表明：随着温度升高,PACS熔体的流体特性逐渐接近牛顿流体;PACS熔体粘度对温度有强烈的依赖性,其软化点在190℃~220℃范围时,其粘流活化能在190~260kJ/mol之间;当PACS的粘度在100Pa.s左右时可纺性好;铝含量对PACS的流变性能和可纺性有重要的影响,随着铝含量的增加,PACS熔体的粘度增大,因而PACS的纺丝温度更高,可纺性变差。The theology and spinnability of PACS with various aluminum contents were studied by a single-pole spinning equipment. It has been shown that： the melting PACS behaves to be a near-Newton fluid with increasing temperature. The viscosity of PACS strongly depends on the temperature. Its apparent viscosity energy occurs between the range of 190 - 260 kJ/mol when its softening point lies between the range of 190℃ -220℃. Its spinnability is good when its viscosity is about 100Pa·s. It is revealed that the higher AI content in PACS will increase the viscosity, leading to a higher spinning temperature and poorer spinnability.

关 键 词：聚铝碳硅烷 流变性能 纺丝性能 SIC纤维 SiC(Al)纤维 

分 类 号：TQ343[化学工程—化纤工业]