聚乙烯醇的制备及其分子链键合方式的测定  

Preparation of Polyvinyl Alcohol and Determination of Its Molecular Chain Linkage

作　　者：宋建华[1] 苏育志[1] 李楠[1] 张建华[1] 吕澍[1] 

机构地区：[1]广州大学化学化工学院

出　　处：《化学教育》2014年第12期26-28,共3页Chinese Journal of Chemical Education

摘　　要：对物理化学综合性实验“聚乙烯醇的制备及其分子链键合方式的测定”进行了研究,得出了最优制备聚乙酸乙烯酯（PVAc）的实验方案.对PVAc醇解得到聚乙烯醇（PVA）,采用黏度法测定了聚乙烯醇被高碘酸盐降解前后的相对分子质量,从而计算出PVA分子链中“头尾相接”和“头碰头”2种键合方式的比例.The comprehensive physical chemistry experiment of ＂preparation of polyvinyl alcohol and determination of its molecular chain linkage＂ was studied. The best preparation scheme of polyvinyl acetate （PVAc） was obtained, and polyvinyl alcohol （PVA） was produced by alcoholysis of PVAc. The molecular weight of the PVA and its product which decomposed by perio- date were determined by viscosity method, then the ratio of the head-to-tail linkage and the head- to-head linkage of PVA molecular chain was calculated.

关 键 词：乙酸乙烯酯 聚乙烯醇 黏度法 综合性实验 键合方式 

分 类 号：O632.31-4[理学—高分子化学] G642[理学—化学]