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借鉴硫脲交联聚乙烯醇缩乙二醛胶粘剂的改性方法,采用合适的改性剂对聚乙烯醇(PVA)进行改性,制备了新型的改性PVA。研究结果表明:PVA通过缩醛反应获得缩醛结构,然后采用硼酸、U(尿素)对聚乙烯醇缩醛分子的羟基进行改性,可获得热稳定性良好的新型改性PVA树脂。
Referring to the modified method of thiourea crosslinked polyvinyl-glyoxal adhesive, polyvinyl alcohol (PVA) was modified by a suitable modifier to prepare a new modified PVA. The results showed that the acetal structure of PVA obtained by acetal reaction, and then the use of boric acid, U (urea) polyvinyl alcohol acetal hydroxyl modified, get a good thermal stability of the new modified PVA resin.