| 引用本文: | 程祥珍,谢征芳,宋永才,等.聚碳硅烷纤维的空气不熔化反应动力学研究.[J].国防科技大学学报,2006,28(6):24-27.[点击复制] |
| CHENG Xiangzhen,XIE Zhengfang,SONG Yongcai,et al.Research on the Air Curing Kinetics of Polycarbosilane Fiber[J].Journal of National University of Defense Technology,2006,28(6):24-27[点击复制] |
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| 聚碳硅烷纤维的空气不熔化反应动力学研究 |
| 程祥珍, 谢征芳, 宋永才, 肖加余 |
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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: |
| 以高压法聚碳硅烷(Polycarbosilane, PCS)纤维的空气不熔化为例，采用多曲线积分法研究了PCS纤维空气不熔化反应动力学。结果表明，高压法PCS纤维的空气不熔化反应活化能约60～70 kJ/mol。通过研究不同的机理函数的对数与温度倒数的关系，结果表明，PCS纤维空气不熔化过程由随机成核和生长机理(n=3)的表面反应控制，根据该反应机理，同样得到高压法PCS的空气不熔化反应活化能约60～70 kJ/mol，指前因子A约为77.64。 |
| 关键词: 聚碳硅烷纤维 空气不熔化 热分析 动力学 |
| DOI： |
| 投稿日期：2006-05-09 |
| 基金项目:湖南省自然科学基金资助项目(03JJY3070)；国防科技重点实验室基金资助项目 |
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| Research on the Air Curing Kinetics of Polycarbosilane Fiber |
| CHENG Xiangzhen, XIE Zhengfang, SONG Yongcai, XIAO Jiayu |
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(College of Aerospace and Materials Engineering， National Univ. of Defense Technology，ChangSha 410073，China)
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| Abstract: |
| The air curing kinetics of PCS fiber was investigated by multi-curve integral method of thermogravimetric analysis. The PCS fiber was obtained by melt spinning of PCS which was synthesized at high temperature under high pressure. The results show that the apparent active energy of curing reaction of the PCS fiber is about 60～70 kJ/mol. The relationships between the mechanism functions and the curing temperature were studied. The results show that the air curing reaction of PCS fiber is controlled by the surface reaction of random nucleation and growth mechanism (n=3). According to the reaction mechanism, the apparent active energy of curing reaction of PCS fiber is also found to be about 60～70 kJ/mol. As a consequence, the exponential coefficient, A, is about 77.64. |
| Keywords: polycarbosilane fiber air curing thermogravimetric analysis kinetics |
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