【摘要】 本文提出了从未知K和a的样品的特性粘数和GPC图谱计算数均分子量的新方法。该法对窄分布或宽分布的样品都适用,并用不同分子量和分子量分布的样品进行了验证,和已知K和a的计算值进行比较,得到非常满意的结果。该法是计算Mn的近似解法,但计算简便。更多还原

【Abstract】 In this paper a novel method is proposed for estimating number-average molecularweight from the intrinsic viscosity and GPC chromatogram of a sample for which theconstants in Mark-Houwink equation is not known.The method was tested on seven sam-ples which have very different value of molecular weight and molecular weight distribu-tion.Results calculated by the method are in good agreement with those obtained usingconventional method which requires constants of Mark-Houwik equation. The method isijust approximate but fairly simple for number-average molecular weight determination.更多还原