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用溶液粘度法来測定高聚物的分子量已經是目前应用得最广泛的方法,这不但因为溶液粘度法需要的设备簡单,測定技术容易掌握,而且实驗結果有相当高的精确度。通过特性粘数-分子量关系式,可以計算試样的粘均分子量,如果試样的特性粘数-分子量关系式尚未訂定,也可以从特性粘数值作为分子量相对数值的衡量,对一般工业生产和研究試驗室中有关高聚物分子量測定方面的要求,已經能够很好地滿足。粘度法的基本原理和实驗技术已經有专門文章和书籍介紹过,这里只想討論一些常見的实驗差錯及其产生的原因。粘度法測定高聚物的分子量基于經驗式
The solution viscosity method to determine the molecular weight of polymers has been the most widely used method, not only because of the solution viscosity method requires simple equipment, measurement techniques easy to master, and the experimental results have a very high accuracy. The viscosity-average molecular weight of the sample can be calculated from the intrinsic viscosity-molecular weight relationship. If the intrinsic viscosity-molecular weight relationship of the sample has not been stipulated, the intrinsic viscosity can also be used as a measure of the relative molecular weight, And research laboratories on the determination of polymer molecular weight requirements, has been able to meet well. The basic principles and experimental techniques of viscosity method have been introduced in a special article and books, here only want to discuss some common experimental errors and their causes. Viscosity method to determine the molecular weight of the polymer based on empirical formula