Abstract In this study, a series of UV-curable waterborne polyurethane (UV-WPU) emulsions with different contents of dipentaerythritol hexaacrylate (DPHA)/dipropylene glycol diacrylate (DPGDA) were prepared using isophorone diisocyanate, and poly(tetramethylene glycol) as the main materials. Besides, DPHA/DPGDA with a mass ratio of 1:1 was used as the reactive diluent and UV curing agent, and pentaerythritol triacrylate was used as the capping agent. The UV-WPU films were obtained by using photo-initiator 184 and an ultraviolet curing machine. The molecular structure was characterized by infrared spectroscopy, and several properties such as particle size, contact angle, tensile properties were measured, thermogravimetric analysis was conducted. Results revealed that a more compact network structure is formed by the introduction of DPHA/DPGDA, with a higher reactivity, into the polyurethane molecule under UV irradiation; tensile strength increases to 21.03 MPa; and several performance parameters improve, with a DPHA/DPGDA content of 40 wt%. However, some phase separation was observed, at a DPHA/DPGDA content of greater than 40 wt%. Graphical Abstract

中文翻译：

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以二季戊四醇六丙烯酸酯/二丙二醇二丙烯酸酯单体制备的紫外光固化水性聚氨酯的制备及性能

摘要 本研究以异佛尔酮二异氰酸酯为主要原料，制备了一系列不同含量的二季戊四醇六丙烯酸酯（DPHA）/二丙二醇二丙烯酸酯（DPGDA）的紫外光固化水性聚氨酯（UV-WPU）乳液。材料。此外，使用质量比为1:1的DPHA/DPGDA作为活性稀释剂和UV固化剂，使用季戊四醇三丙烯酸酯作为封端剂。UV-WPU薄膜是通过使用光引发剂184和紫外线固化机获得的。通过红外光谱对分子结构进行表征，并测量了粒径、接触角、拉伸性能等多种性质，并进行了热重分析。结果表明，通过引入 DPHA/DPGDA，形成了更紧凑的网络结构，具有较高的反应活性，在紫外线照射下进入聚氨酯分子；抗拉强度增加到21.03 MPa；并且一些性能参数得到改善，DPHA/DPGDA 含量为 40 wt%。然而，在大于 40 重量％的 DPHA/DPGDA 含量下观察到一些相分离。图形概要