超高相对分子质量聚丙烯腈基多孔中空氧化纤维的制备工艺研究

STUDY ON PREPARATION TECHNOLOGY OF POROUS HOLLOWOXIDATION FIBER BASED ON ULTRAHIGH MOLECULARWEIGHT POLYACRYLONITRILE

以超高相对分子质量聚丙烯腈基多孔中空纤维为原丝制备了多孔中空氧化纤维 ,研究了其制备工艺 .详细考察了氧化工艺条件 (温度、时间 )对多孔中空氧化纤维环化程度的影响 ,发现环化程度随氧化温度升高和氧化时间延长而提高 ;与以普通分子质量聚丙烯腈基实心纤维为原丝相比 ,氧化温度应较低 (<2 4 0℃ )、氧化时间应较短 (<2h) .

The preparation of a kind of porous hollow oxidation fiber based on ultrahigh molecular weight polyacrylonitrile ( UHMW-PAN) as precursor is presented. The effects of preparation technology conditions, oxidation temperature and oxidation time, on degree of ring formation of porous hollow oxidation fiber are studied in details. It shows that degree of ring formation is increasing with increasing of oxidation temperature and time. Comparing with normal molecular weight polyacrylonitrile (CMW-PAN) based solid fibers, the oxidation temperature of porous hollow fiber based on UHMW-PAN should be low (< 240 degreesC) and oxidation time should be short (< 2 h).