引用本文: | 赵大方,王海哲,胡天娇,等.聚铝碳硅烷的流变性和纺丝性研究[J].国防科技大学学报,2009,31(6):144-148.[点击复制] |
ZHAO Dafang,WANG Haizhe,HU Tianjiao,et al.Study on the Rheology and Spinnability of Polyaluminocarbosilane[J].Journal of National University of Defense Technology,2009,31(6):144-148[点击复制] |
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聚铝碳硅烷的流变性和纺丝性研究 |
赵大方1,2, 王海哲1, 胡天娇1, 李效东1 |
(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)
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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。 |
关键词: 聚铝碳硅烷 流变性能 纺丝性能 SiC纤维 SiC(Al)纤维 |
DOI: |
投稿日期:2009-04-21 |
基金项目:国家自然科学基金资助项目(59972042) |
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Study on the Rheology and Spinnability of Polyaluminocarbosilane |
ZHAO Dafang1,2, WANG Haizhe1, HU Tianjiao1, LI Xiaodong1 |
(1.College of Aerospace and Materials Engineering, National Univ. of Defense Technology, Changsha 410073, China;2. 2.Department of Space Equipment, the Academy of Equipment Command and Technology, Beijing 101416, China)
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Abstract: |
The rheology 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 Al content in PACS will increase the viscosity, leading to a higher spinning temperature and poorer spinnability. |
Keywords: polyaluminocarbosilane rheology spinnability SiC fibers SiC(Al)fibers |
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