部分乙酰化聚乙烯醇的FTIR研究——谱图分析程序的应用

FTIR STUDIES OF PARTIALLY ACETYLATED POLY-(VINYL ALCOHOL)——Application of Spectra Analyzing Programm

利用FTIR研究了部分乙酰化聚乙烯醇中羰基的伸缩振动,证明了部分乙酰化聚乙烯醇的醋酸乙烯酯结构单元中的羰基可与乙烯醇结构单元中的羰基形成分子间氢键和分子内氢键。通过对部分乙酰化聚乙烯醇的羰基伸缩振动吸收谱带的二阶导数谱的分析以及自编的最小二乘优化曲线拟合程序的应用,证实了部分聚乙烯醇为无规共聚物。

The carbonyl stretching vibration of partially acetylatedpoly (vinyl aleohol) was examined through FTIR analysis. Intramolecular and intermolecular hydrogen bonding imteraction between the VAc carbonyl group and VA hydroxyl group were made certain. Through the second-derivative spectra and least-square optimum curve fitting programm, the structure of the partially acetylated poly (vinyl alcohol) was identified and it is a random copolymer.