凝胶色谱法测定聚丙烯腈聚合物的相对分子质量及其分布

Determination of Molecular Weight and its Distribution of Polyacrylonitile with Gel Permeation Chromatography Method

通过一系列的试验,确定了最佳的凝胶色谱试验条件:采用含有0.025 mol/L KNO_3的DMF为流动相;样品质量浓度为1 mg/m L,进样量200μL;柱温采用80℃,采用窄分布的聚苯乙烯为标样绘制标准曲线,然后采用纯PAN标样校正仪器。该方法快速准确,具有良好的重现性,可满足生产和科研的需要。

A series of tests are carried out to confirme the best test-conditions of GPC for PAN： using DMF solvent with 0.025 mol/L KNO3 as eluant, concentration of the sample is 1 mg/mL, injection volume is 100 μL, column oven temperature is 80 ℃. Even so, using polystyrene with narrow distribution draws standard curve, then using pure PAN with wide distribution calibrates the instrument. This method is fast and accu- rate, and has good reproducibility, can meet the needs of Droduction and scientific research.