淀粉改性聚乙烯醇缩甲醛树脂的工艺研究

由于传统的PVA缩醛树脂是由PVA和甲醛制备的,所以树脂中的游离甲醛含量高。通过改变合成工艺,用淀粉对聚乙烯醇缩甲醛树脂进行改性,制得了游离甲醛含量低的树脂。考察了淀粉用量、体系pH值、反应时间、反应温度对树脂性能的影响,并采用了红外光谱对树脂结构进行了表征。根据此合成方法生产的产品具有工艺简单、游离甲醛含量低、耐水性能好、成本低等优点。

Study on the Technology of PVA Acetal Resins Modified with Starch

The traditional PVA acetal resins were synthesized by PVA and formaldehyde,so they contained plenty of free formaldehyde.In this paper,synthesis technology of PVA acetal resins was changed,and PVA acetal resins was modified with starch,and this acetal resins contained little free formaldehyde.The effects of mass of starch,pH value,reaction time and reaction temperature on property of the PVA acetal resins were investigated.In additional,the structure of PVA acetal resins was characterized by FTIR.According ...