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分析了预氧化时间、温度对预氧丝密度的影响,研究了预氧丝密度和牵伸率以及张力、碳化升温速率与碳纤维抗拉强度之间的关系。试验结果证明:延长预氧化时间和提高预氧化温度,预氧丝密度提高;当预氧丝密度为1.355 g/cm3时,得到的碳纤维的强度最高;当预氧化牵伸率为0.93%时,对应的碳纤维强度为4.84 GPa;在300℃/min低温碳化升温速率和1000℃/min高温碳化升温速率下,可以得到高性能碳纤维。
The influence of pre-oxidation time and temperature on the preoxidation wire density was analyzed. The relationship between the pre-oxygening wire density and the drawing rate, the tension and the carbonization rate and the tensile strength of the carbon fiber were studied. The experimental results show that the preoxidized fiber density increases when the preoxidation time is prolonged and the preoxidation temperature is increased. When the preoxidized fiber density is 1.355 g / cm3, the carbon fiber obtained has the highest strength. When the preoxidation draft rate is 0.93% The corresponding carbon fiber strength is 4.84 GPa. High-performance carbon fibers can be obtained at low temperature carbonization rate of 300 ℃ / min and high temperature carbonization rate of 1000 ℃ / min.