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以异佛尔酮二异氰酸酯(IPDI)、二羟甲基丙酸(DMPA)和二乙醇胺(DEOA)为原料通过偶合单体反应法制备出了不同代数的脂肪族超支化水性聚氨酯(HWPU)。通过红外光谱(FT-IR)和核磁共振波谱(NMR)对其结构进行了表征,采用热重分析仪(TG)和示差扫描量热仪(DSC)分别对各代HWPU的热性能进行测试分析对比。TG结果表明不同代数的HWPU均在180～275℃和275～450℃范围内有较大热失重;DSC测试第2代至第5代的HWPU的玻璃化温度(Tg)分别为:104.3℃,123.0℃,136.6℃,141.9℃,表明随着产物代数的增加Tg逐渐升高,但温度增加幅度逐渐缓慢。
Different algebraic aliphatic hyperbranched waterborne polyurethanes (HWPU) were prepared by coupling monomer reaction with isophorone diisocyanate (IPDI), dimethylolpropionic acid (DMPA) and diethanolamine (DEOA) as raw materials. Their structures were characterized by FT-IR and NMR. Thermal analysis (TG) and differential scanning calorimetry (DSC) were used to analyze the thermal properties of each generation of HWPU Compared. The results of TG showed that the HWPU of different algebraic groups all had greater weight loss at 180-275 ℃ and 275-450 ℃. The glass transition temperatures (Tg) of HWPU from the second to the fifth generation of DSC were 104.3 ℃, 123.0 ° C, 136.6 ° C, 141.9 ° C, indicating that the Tg increases gradually with the increase of the product algebra, but the temperature increases slowly.