【摘要】 超支化聚酯Boltorn H20分子末端含有很多羟基,采用回流冷凝法,用顺丁烯二酸酐将H20部分端羟基进行改性,从而在H20分子上引入了端羧基.主要讨论了溶剂和改性不同端羟基数目对反应的影响,反应终点采用红外光谱来确定.核磁共振谱图证实了Boltorn H20被成功改性,这为进一步研究超支化聚酯在水性涂料中的应用奠定了基础.更多还原

【Abstract】 The hyperbranched polyester Boltorn H20 contains a lot of hydroxyl groups,the reflux condensation method was adopted,some hydroxyl groups of H20 was modified with maleic anhydride,thereby some carboxyl groups were introduced in the H20. The effect of different solvents and modified hydroxyl number on the reaction time were discussed. Reaction end point was determined with FTIR,NMR spectroscopy confirmed that Boltorn H20 was successfully modified with maleic anhydride,this may be usefull for further study of hyperbranched polyester application on waterborne coatings.更多还原