| 引用本文: | 楚增勇,刘辉,冯春祥,等.沉淀分级法调制纺丝级高熔点聚碳硅烷.[J].国防科技大学学报,2002,24(1):39-43.[点击复制] |
| CHU Zengyong,LIU Hui,FENG Chunxiang,et al.Modulation of Spinnable Polycarbosilane with a High Melting Point via Fractional Precipitation[J].Journal of National University of Defense Technology,2002,24(1):39-43[点击复制] |
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| 沉淀分级法调制纺丝级高熔点聚碳硅烷 |
| 楚增勇, 刘辉, 冯春祥, 王应德, 薛金根, 宋永才, 邹治春 |
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(国防科技大学 航天与材料工程学院，湖南 长沙 410073)
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| 摘要: |
| 作为碳化硅纤维先驱体的聚碳硅烷应当具有较高的熔点与良好的可纺性，但是提高熔点对合成条件提出了苛刻要求。为了解决这一矛盾，首先通过沉淀分级获得了高熔点（>280℃）的聚碳硅烷组分，然后再加入10-30wt%低熔点组分来调节其纺丝性能，成功地调制出了高熔点（>250℃）、具有良好纺丝性的聚碳硅烷先驱体。 |
| 关键词: 聚碳硅烷 沉淀分级 高熔点 可纺性 |
| DOI： |
| 投稿日期：2001-09-04 |
| 基金项目:国家部委项目资助（12.1.10.1） |
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| Modulation of Spinnable Polycarbosilane with a High Melting Point via Fractional Precipitation |
| CHU Zengyong, LIU Hui, FENG Chunxiang, WANG Yingde, XUE Jingen, SONG Yongcai, ZHOU Zhichun |
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(College of Aerospace and Materials Engineering, National Univ. of Defense Technology, Changsha 410073,China)
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| Abstract: |
| As a preceramic polymer to silicon carbide fibers, polycarbosilane (PCS) should have both a relatively higher melting point (m.p.) and a relatively good spinnability. However,to increase m.p. means a rigid requirement for the synthesis conditions. To solve this problem, we firstly obtain a higher m.p. (>280℃) PCS fraction via fractional precipitation,and then add 10-30wt% of a lower m.p. fraction to above PCS,thus obtain PCS mixture,then,both have a higher m.p. (>250℃) and a relatively good spinnability. |
| Keywords: Polycarbosilane fractional precipitation high melting point spinnability |
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