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一种聚丙烯腈预氧纤维和碳纤维的制备方法,属于纤维制备技术领域。使聚丙烯腈原丝在常压和空气介质中以恒定的速度通过连续化预氧化设备,采用2~4个温区梯度升温,总时间控制在30~45 min,在预氧化过程的低温段,反应温度为200~240℃,加入总的0%~8%的正牵伸,总时间为15~25 min;在高温段,反应温度为240
A preparation method of polyacrylonitrile pre-oxygen fiber and carbon fiber belongs to the technical field of fiber preparation. The polyacrylonitrile precursor yarn was passed through a continuous pre-oxidation equipment at a constant speed in an atmosphere of normal pressure and air with a temperature gradient of 2 to 4 temperature zones for a total time of 30 to 45 minutes. During the low temperature stage of the pre-oxidation process, , The reaction temperature is 200 ~ 240 ℃, adding 0% ~ 8% of the total positive draft, the total time of 15 ~ 25 min; at high temperature, the reaction temperature is 240