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建立了GPC凝胶渗透色谱法测定苯丙树脂相对分子质量及其分布的方法:采用Styragel Wat 044207(500~30 000)(THF),Wat 044210(5 000~600 000)(THF)及Wat044213(5 000~4 000 000)(THF)3根凝胶色谱柱串接,柱温35℃;四氢呋喃为流动相,流速1 mL/min;采用示差折光检测器,待测样品浓度0.03 g/mL,精密度和重现性实验结果表明:该方法数据可靠、重复性好、简单易行。
A method for the determination of the relative molecular mass and distribution of styrene-acrylic resin by GPC gel permeation chromatography was established. Styragel Wat 044207 (500 ~ 30 000) (THF), Wat 044210 (5000 ~ 600 000) (THF) and Wat044213 (THF). The column temperature was 35 ℃. Tetrahydrofuran was used as the mobile phase and the flow rate was 1 mL / min. The refractive index of the sample was 0.03 g / mL, The experimental results of precision and reproducibility show that the method is reliable, reproducible and simple.