GPC联用粘度计——Ⅱ对GPC标定和高聚物K、α常数测定的应用

GPC联用粘度计——Ⅱ对GPC标定和高聚物K、α常数测定的应用 GPC COMBINED WITH VISCOMETRY（Ⅱ） 程叔耀 first-author 付功成 田炳寿 韩可敏 本文利用GPC直接联用粘度计的实验装置,提出了一个可靠的GPC标定方法。应用几个一般沉淀分级所得的宽分布试样。我们测定了所有试样谱图峰值时的特性粘度,并由Mark-Houwink公式计算出相应的分子量,从而得到了GFC标定曲线。文中比较了由本法得到的聚苯乙烯分子量标定线与直接用聚苯乙烯窄分布标样所得的标定线,二者完全一致。在聚合物的Mark-Houwink公式未知的情况下,我们采用上述的方法和GPC柱组的普适标定线,从而得到了氯乙烯-醋酸乙烯酯共聚物的GPC标定线,而且求得了共聚物的Mark-Houwink公式为:[η]=2.02×10 -2 M 0.709 （ml/g）（25℃,THF）. This paper used the experiment apparatus of GPC combined directly with capillary viscometer, and advanced a GPC calibration method that we consider feasible and reliable. Using several broad distribution samples which are obtained from general fractional precipitations, we measured intrinsic viseosity of the peak value of chromatogram for all samples and calculated corresponding molecular weight by Mark-Houwink formula, thus GPC calibration curve is obtained. In the paper are compared calibration curves of molecular weights for polystyrene, obtained by our method and directly obtained by narrow distribution standard sample. Both of them are in complete correspondence. In case if Mark-Houwink formula of polymer is unknown to us, we adopted above mentioned method and universal calibration curve of GPC roloums, thus obtained GPC calibration curve of vinyl-chloride-acetate copolymer and its Mark-Houwink formula: [η]=2.02×10 -2 M 0.709 （ml/g）（25℃, THF.） 1981-04-01 2021-04-01 4