采用聚己二酸1，4-丁二醇酯二醇（PBA，Mn=2 000）为软段，对苯二酚二羟乙基醚（HQEE）为扩链剂合成了一组稳定的水性聚氨酯（WPU）乳液，探讨了HQEE含量对水性聚氨酯性能的影响。通过激光散射粒度仪测试表征了乳液形态，采用傅里叶变换红外光谱（FT-IR）、X-射线衍射（XRD）表征了胶膜的结构，通过差示扫描量热（DSC）、热重分析（TGA）和电子拉力实验机研究了胶膜的热性能、力学性能。结果表明：随着HQEE含量的增加，乳液平均粒径先增大后减小，胶膜的结晶度降低，耐热性提高，胶膜的拉伸强度呈现先增大后减小的趋势。当HQEE含量为6.93%时，胶膜的力学性能达到最佳，拉伸强度达到29.9 MPa。
Waterborne polyurethanes (WPUs) are prepared with poly (1,4-butanediol adipate)diol (PBA,Mn=2 000) as soft segments and hydroquinone dihydroxyethyl ether (HQEE) as chain extender. The effect of the HQEE contents on the properties of waterborne polyurethanes are investigated. The morphology of the emulsion is characterized by laser scattering particle size analyzer. The structure of the films is characterized by Fourier transform infrared spectroscopy (FT-IR) and X-ray diffraction (XRD). The thermal and mechanical properties of the films are studied by the differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA)and electronic tensile testing. The results show that the content of HQEE results in the decrease of crystallinity of WPUs. Moreover, the average particle size of the emulsion first increases and then decreases, and the water resistance of the film decreases, and the heat resistance of the film increases and the tensile strength of the film also increases first and then decreases. The results indicate that the tensile strength of the film reaches up to a maximum value of 29.9 MPa when the HQEE content is 6.93%.
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