为解决短切碳纤维制备过程中存在的质量不稳定及难以控制等问题，对影响短切碳纤维质量的工艺参数进行了研究． 选择烘箱温度、压辊压力、刀辊压力和短切速度4 种工艺参数为评价因子，长度离散度、宽度均匀性离散度、断口整齐度和断面形貌为质量评价指标，用正交法设计碳纤维短切实验，得到不同工艺参数的短切碳纤维样品，然后基于实验数据采用熵理论确定质量评价指标的客观权重，最后应用模糊综合评价方法对工艺参数进行综合评价． 评价结果表明，当烘箱温度为 150 ℃、压辊压力和刀辊压力分别为 0． 2 和 0． 4MPa、短切速度为 6． 9m/min 时，制备出来的短切碳纤维质量最好．

In order to overcome the instability and control difficulty of the chopping process of carbon fibers (CFs),the process parameters affecting the quality of chopped CFs were investigated.By taking the oven tempera- ture,the press roll pressure,the cutter roll pressure and the chopping speed as the evaluation factors and by using the length dispersion,the width uniformity,the fracture section uniformity and the fracture surface morphology as the quality evaluation indexes,some orthogonal experiments were designed and carried out,from which the evalua- tion weight of each quality evaluation index was determined based on the entropy theory.Moreover,the chopping process parameters were evaluated via a fuzzy comprehensive evaluation.The results show that the CFs with the best quality can be chopped at an oven temperature of 150℃,a press roll pressure of 0. 2MPa,a cutter roll pressure of 0. 4MPa and a chopping speed 6. 9m/min.