| 引用本文: | 王应德,蓝新艳,王鲁,等.聚碳硅烷纤维成形过程的稳定性研究.[J].国防科技大学学报,2004,26(6):21-24.[点击复制] |
| WANG Yingde,LAN Xinyan,WANG Lu,et al.Studies on the Spinning Stabilities of Continuous Polycarbosilane Fibers Formation[J].Journal of National University of Defense Technology,2004,26(6):21-24[点击复制] |
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| 聚碳硅烷纤维成形过程的稳定性研究 |
| 王应德1, 蓝新艳1, 王鲁1,2, 薛金根1, 姜勇刚1 |
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(1.国防科技大学 航天与材料工程学院，湖南 长沙 410073;2.徐州空军学院航空物资油料系，江苏 徐州 221000)
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| 摘要: |
| 通过改变不同的熔融纺丝工艺研究了聚碳硅烷纤维熔融纺丝时纺丝稳定性的影响因素。研究表明：提高介质温度到180～200℃、采用向下的环形吹风、控制成形区气流的大小与流向、纺程控制在90cm左右、加强集束与控制外部条件的稳定性等有利于提高纺丝稳定性。 |
| 关键词: 聚碳硅烷 碳化硅 纤维 成形 纺丝稳定性 |
| DOI： |
| 投稿日期：2004-09-05 |
| 基金项目:湖南省自然科学基金资助项目(02JJY2083)；国家自然科学基金资助项目(50082007)；国家863高技术资助项目(2002AA305101) |
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| Studies on the Spinning Stabilities of Continuous Polycarbosilane Fibers Formation |
| WANG Yingde1, LAN Xinyan1, WANG Lu1,2, XUE Jingen1, JIANG Yonggang1 |
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(1.College of Aerospace and Materials Engineering, National Univ. of Defense Technology, Changsha 410073, China;2.Supply and Oil Department, Xuzhou Airforce College, Xuzhou 221000,China)
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| Abstract: |
| A continuous polycarbosilane(PCS) multifilament was melt spun at≈300℃. Spinning was performed with a laboratory scale extrusion apparatus equipped with a multi-hole spinneret. The filament was drawn down to a diameter of 10～25μm, the mechanical stretching being applied to the filament via the take-up reel. The spinning stability was investigated by introducing the ringy spinning channel and mobile take-up reel and changing the melt spinning processing, in order to obtain continuous PCS-derived silicon carbide fiber with fine diameter,lower diameter's dispersion rate and higher tensile strength. The results show that increasing the cooling temperature within the 180～200℃ range, introducing ringy and downward airflow by a special spinning channel, controlling a proper spinning line of about 90cm in length, enhancing fibers' gathering and controlling the stabilities of spinning conditions can improve the spinning stability availably. |
| Keywords: polycarbosilane(PCS) silicon carbide fibers formation spinning stability |
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