前文已报道了用电位滴定和电导滴定的方法,测定了酚瑞基双酚A聚砜的数均分子量至20000。本文用紫外吸收光谱来分析聚合物中酚端基浓度,进而求其数均分子量。 Shchori和Mcgratb曾研究,直接测定在稀溶液中酚端基的聚碳酸酮的电子吸收光谱,可以用来迅速、灵敏的测定其到100000。这个方法主要基于 It has been previously reported that the number average molecular weight of phenylethylamine bisphenol A polysulfone is 20000 measured by potentiometric titration and conductometric titration. In this paper, UV absorption spectroscopy to analyze the concentration of phenol end groups in polymers, and then find the number average molecular weight. Shchori and McGratb have studied direct determination of the electron absorption spectra of phenolic-terminated polyketones in dilute solutions, which can be used to quickly and sensitively determine them to 100,000. This method is mainly based on