声速仪在PAN基碳纤维制备过程中的应用

Application of sound velocimeter during the preparation of PAN-based carbon fibers

采用声速仪及X射线衍射仪对不同牵伸倍数和不同预氧化程度的PAN纤维进行取向度和预氧化程度的测试,并将其结果进行对比。实验结果表明,在对PAN纤维取向度和预氧化程度表征中声速仪是一种操作简单、使用方便、结果可靠的仪器,配合X射线衍射仪,可以用来研究PAN纤维非晶区的取向结构,与X射线衍射仪所测芳构化指数(AI)来表征预氧化程度具有相同的效果。

PAN fibers with different drawing ratio and different preoxidation degree were investigated by means of sound velocimeter and X-ray diffraction meter. The experimental results show that the sound velocimeter is a very convenient and applied instrument for measuring overall orientation degree and preoxidation degree of PAN fibers, and can be used to study the orientation degree in amorphous region of PAN fiber associating with X-ray diffraction meter, and has the same effect on measuring preoxidation degree of PAN fiber with X-ray diffraction meter.