【摘要】 文章介绍了一个经过改进的综合化学实验,通过聚乙烯醇和甲醛的缩醛化反应进一步了解高分子化学反应的原理,通过胶水粘度、固含量和游离甲醛含量的测定掌握其性质的测定方法,掌握缩醛化度和转换率的计算方法并能用其结果来评价反应程度,通过红外光谱法了解高分子官能团侧基的反应情况。更多还原

【Abstract】 The article describes the improved comprehensive chemical experiment. Further understand the principle of polymeric chemical reaction by the acetalization of polyvinyl alcohol and formaldehyde. Study the determination method of polyme properties through the assay of glue viscosity, solid content and free formaldehyde content. Master the calculation methods of acetalization degree and conversion rate, and using the results to evaluate the extent reaction. Understand the reaction of polymer functional group side groups by infrared spectroscopy.更多还原