摘要
本文利用正态分布型模型GPC谱图从理论上分析了利用GPC谱图和特性粘数来求样品重均分子量可能引入的误差问题。理论和实验表明,当样品的α在0.6—0.8之间,分子量分散指数(?)_w/(?)_n<10时,利用文献[3]提出的方法计算近正态分布的试样的重均分子量的误差不会大于10％。而且分子量分布越窄,α值越接近0.6185,所得的结果越准确。
The error analysis of the method for estimation of weight average molecular weight ofpolymer sample from the intrinsic viscosity, and GPC chromatogram of normal distributionshape was discussed in this paper. The error analysis and experiment result showed that the ralative error of weight avarge molecular weight of polymer sample was not more than 10% by the method proposed in refrence (3), when 0.6<a<0.8, while polydispersity index was not more than 10. The less polydispersity index of the polymer sample the more correct result can be obtained.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
1991年第3期257-264,共8页
Acta Polymerica Sinica
关键词
凝胶渗透色谱
谱力
重均分子量
GPC, Average molecular (wt), Intrinsic viscosity,Calculation GPC chro-matograms, Error analysis
