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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。
The reaction process of polycarbosilane fibers in air was studied by TG-DTA and kinetic calculation. The influence of non-melting conditions on fiber weight gain and non-melting degree was also discussed. The results showed that the oxidation reaction of PCS fibers was not a simple first-order reaction. With the increase of heating rate, the reaction exothermed rapidly and led to further chemical reaction, which led to the change of reaction mechanism. Elevated temperature or extended time are conducive to the fiber does not melt.