小角X射线散射研究聚丙烯腈预氧丝的微孔结构

Small Angle X-ray Scattering Study on the Micropore Structure in PAN-based Fiber during Preoxidation

利用小角X射线散射(SAXS)技术实现对聚丙烯腈纤维X射线小角散射强度的准确测定,基于X射线小角散射理论,利用逐级切线法,通过计算机数据拟合处理,对不同预氧化温度聚丙烯腈纤维的微孔洞大小、体积百分数进行了定量表征;给出了聚丙烯腈纤维微孔大小、小孔洞所占体积百分数随预氧化温度的变化规律.

Small angle X-ray scattering technique was used to measure the size of micropore in PAN-based fiber during preoxidation. Computing program was used in analyzing SAXS data, which indicated that the size of micropore increased with temperature. Also we obtained the calculating method and calculating formulas of the small micropore volume percentage. The changing of those parameters according temperature had been given.