摘要
用未知样品的已知分子量组分峰位订定了聚芳砜低聚体及其双烯大分子单体的凝胶色谱标定曲线,研究了较宽分子量范围(10~2~10~6)聚苯乙烯的Mark-Houwink参数在乙醇-氯仿混合溶剂中的变化情况;在低分子量区,以标定曲线为媒介,根据[η]M对流体力学体积的普适性,从聚苯乙烯的Mark-Houwink参数得到了聚芳砜低聚体及其双烯大分子单体的Mark-Houwink方程。
Polysulfone oligomers and its divinyl macromolecular monomer were analyzed by gel permeation chromatography with coboiled solvent of chloroform and alcohol. Based on the separated peaks of compositions of low molecular weight oligomers, we obtained the calibration curves of polysulfone oligomers and its divinyl macromolecular monomer. The molecular weight data achieved are in accordance with the result determined by HPLC. In the wide range of molecular weight (650-~2300000), the intrinsic viscosity of narrow distribution polystyrene was determined, we found that Mark-Houwink constant a changed from 0.714 to 0.50 with the decrease of molecular weight. As the calibration parameter of [η]M is universal, we have obtained the Mark-Houwink expressions of polysulfore oligomers and its divinyl macromolecular monomer from the calibration curves.
出处
《吉林大学自然科学学报》
CSCD
1990年第6期80-84,共5页
Acta Scientiarum Naturalium Universitatis Jilinensis
关键词
聚芳砜低聚体
双烯大分子
凝胶色谱
polysulfone oligomers, divinyl macromer, GPC, Mark-Houwink expression