| 聚碳硅烷纤维不熔化处理的研究(Ⅰ)反应过程的增重及其动力学计算 |
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| 引用本文： | 李晓霞,冯春祥,宋永才.聚碳硅烷纤维不熔化处理的研究(Ⅰ)反应过程的增重及其动力学计算[J].宇航材料工艺,1998(3). |
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| 作者姓名： | 李晓霞 冯春祥 宋永才 |
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| 作者单位： | 国防科技大学五0二教研室!长沙，410073 |
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| 摘 要： | 利用TG－DTA和动力学计算方法对聚碳硅烷纤维在空气中的反应过程进行了研究，探讨了不熔化工艺条件对纤维增重及其不熔化程度的影响。结果表明，PCS纤维的氧化反应不是简单的一级反应，随着升温速率的加快，反应急剧放热，并引起进一步的化学反应，导致反应机理发生改变。升高温度或延长时间均有利于纤维的不熔化。
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| 关 键 词： | 聚碳硅烷 SiC纤维 不熔化 反应动力学 |
Study on Curing of Polycarbosilane Fibers (I)Weight Gain and kinetics Calculation During Curing Reaction |
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| Li Xiaoxia, Feng Chunxiang, Song Yongcai.Study on Curing of Polycarbosilane Fibers (I)Weight Gain and kinetics Calculation During Curing Reaction[J].Aerospace Materials & Technology,1998(3). |
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| Authors: | Li Xiaoxia Feng Chunxiang Song Yongcai |
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| Institution: | Dept.5 of National University of Defence Technology ChangSha 410073 |
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| Abstract: | The reaction process of PCS fibers in air was investigated by TG - DTA and kinetics calculation methods. Effects of curing conditions on weight gain and curing degree of PCS fibers were researched. The results showed thatthe oxidation reaction of PCS fibers was not a simple one - step reaction, and reaction heat was produced rapidly withtemperature - rising rate increasing so that furthur reactions occured and reaction mechanism was changed. Raising temperature and extending curing time benefit fibers curing. |
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| Keywords: | Polycarbosilane SiC fibers Curing Reaction kinetics |
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