以甲苯二异氰酸酯(TDI)、聚氧化丙烯二醇、2,2-二羟甲基丙酸、酸性媒介黑T(EBT)或1,4-丁二醇(BDO)等为主要原料,经自乳化法分别合成制备出TDI型水性聚氨酯EBT-PU和BDO-PU.Fourier变换红外光谱分析证实了EBT-PU和BDO-pU的结构.研究发现由于EBT接入聚氨酯分子链时引起助色团-OH消失以及EBT中偶氮基生色团与萘环等整体共轭体系受到影响,528nm处的UV-vis吸收峰出现了44nm的红移.虽然EBT-PU和BDO-PU分子链中软硬段都不相容,但EBT共轭结构较BDO的脂肪链结构对软硬段不相容性影响更大.实验证实EBT-PU染料是一非晶聚合物,EBT的共轭结构可使EBT-PU热稳定性得到明显改善.
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